Metrohm offers analytical solutions for quality control of basic chemicals and raw materials used in surface finishing processes. Titration can be used to determine concentrations of common acids and bases. Ion chromatography can detect impurities in chemicals like hydrogen peroxide and isopropanol by using inline matrix elimination. When ultratraces need to be found, inline preconcentration can be added for high sensitivity analysis.

1. Surface finishing
Process control in electroplating and
PCB manufacturing

2. 02
Metrohm...
• is the global market leader in titration
• is the only company to offer a complete range of ion analysis equipment – titration,
voltammetry and ion chromatography
• is a Swiss company and manufactures exclusively in Switzerland
• grants a 3-year instrument warranty and a 10-year warranty on chemical suppressors for
ion chromatography
• provides you with unparalleled application expertise
• offers you more than 1300 applications free of charge
• supports you with expert service through local representatives and regional support centers
• is not listed on the stock exchange, but is owned by a foundation
• gives the interests of customers and employees priority over maximizing profit

3. Metrohm – customized analysis for surface finishing
An industry with high standards
The coating and finishing of surfaces using electroplating required precision − both in the laboratory and atline and
03
techniques is a highly sophisticated process. Be it the online in the process environment.
finishing of metal parts or the coating of printed circuit
boards, the quality required in the intermediate and end Count on our support
products is only achieved if the composition of the We offer you not only first-rate instrumentation, but
process baths is right. At the same time, rising costs of rather complete solutions for the particular task at hand.
raw materials and energy make it absolutely essential to Your Metrohm contacts are experienced specialists, who
drive production as efficiently as possible. develop customized applications for you and support you
in every aspect of the production process.
As a leading manufacturer of instruments for chemical
analysis we know about these challenges. That is why we Discover on the following pages what solution Metrohm
offer you state-of-the-art instrumentation to control and offers you to ensure the quality of your products.
optimize the quality of your coating processes with the Challenge us!
Part I: Solutions for laboratory analysis pages 4 - 10
Part II: Processes and applications pages 11 - 25
Part III: Solutions for atline and online analysis pages 26 - 31

4. Part I: Solutions for laboratory analysis
04 Titration and pH measurement
Titration is an established analytical technique in quality Solutions for every budget and every requirement
control of electroplating processes. Titration combines pH measurement – 826 pH mobile / 827 pH lab
utmost precision with a very easy procedure. In most The 827 pH lab and its portable twin, the 826 pH mobile,
cases it is possible to use undiluted sample solution to are robust, easy-to-use pH meters that make no compro-
determine the compenents of reaction solutions. This mises when it comes to accuracy and reliability. Their
enables even semiskilled users to carry out the analysis memory can store up to 200 GLP-compliant determina-
quickly and accurately. Because of the wide range of tions with date, time and sample identification, which
opportunities for automation, the amount of work can be documented either electronically or on paper.
required for analysis is generally limited to providing an
aliquot of sample and pressing a <Start> key.
Versatile and convenient
Another benefit of titration is its versatility. Different
analyses can be performed with one and the same basic
instrument: e.g., monitoring the content of electroplat-
ing baths, analyzing acid mixtures in etching baths or
checking the purity of rinsing solutions.
TM
Modern titration software such as tiamo reduce paper-
work to a minimum. All the determinations are saved in
the database and can at any time be classified according
to whatever criteria one chooses by means of the search
functions and, if necessary, printed out in freely selectable
formats.
848 Titrino plus
The 848 Titrino plus is the most economical solution for
all routine potentiometric titrations, such as acid/base,
redox, precipitation and surfactant titrations, and also
complexometry. Its ease of use, the output of results on
paper and the collection of results in the database soft-
ware tiBase make documentation of results perfectly easy.

5. 905 Plate Titrando
The Plate Titrando offers a comprehensive package for
05
the most common potentiometric analyses in the electro-
plating industry. It contains all the accessories for acid/
base and redox titration and for the determination of
chloride. Its complete intelligence monitors all the impor-
tant system components, such as buret or sensor. The
patented Dosino technology provides for contact-free
handling of reagents and burets.
Automation for Titration
862 Compact Titrosampler
The 862 Compact Titrosampler combines the functions
of the 848 Titrino plus with the possibility for automation
for up to 11 samples in one instrument – on a minimal
footprint. Due to the preprogrammed automated meth-
ods, including rinsing procedures, operation of the
equipment is amazingly simple.
Robotic Transfer Analyzer
Metrohm offers you comprehensive solutions for the
complete automation of your titrimetric analyses. The
benefit is evident: higher sample throughput, minimized
risk for operating errors, more precise and consistent
results and, of course, enormous savings on time and
costs. All of this comes to your lab with the Robotic
Transfer Analyzer. Just put your samples on the rack –
everything else from sample preparation to analysis is
taken care of by the automated system.

6. Ion chromatography
06 Multicomponent determination with a single
analysis
Metrohm Inline Sample Preparation Techniques
in surface coating:
Ion chromatography (IC) enables the determination of • Inline Ultrafiltration to remove particles from various
numerous main and secondary components of electro- samples
plating baths as well as traces of impurities in the form of • Inline Dialysis for ion analysis in emulsions and
organic and inorganic ions or polar substances with soap-containing rinsing solutions
utmost reliability and precision. A major benefit of ion • Inline Dilution to monitor acid baths and component
chromatography is that chemically similar substances can analysis of electroplating bath solutions
be determined in parallel in a single analysis. The analyte • Inline Matrix Elimination to analyze rinsing solutions
concentrations may extend from the ng/L to % ranges. such as isopropanol
• Inline Preconcentration for trace analysis in ultrapure
Save time and costs with automated sample water
preparation • Inline Neutralization and Inline Cation Removal for
Ion chromatographic analyses can be automated easily analyzing impurities in electroplating baths
and efficiently; interfering matrix effects can be avoided • Intelligent Partial-Loop Injection Technique
by choosing the appropriate detection method or com- guarantees variability and simplicity in your analysis
bining the sample delivery with one of our numerous
Inline Sample Preparation Techniques. These inline tech-
niques, some of them patented by Metrohm, make it
possible to integrate the sample preparation into the
analysis and to automate it completely. This increases
reliability, saves manual work and guarantees traceability
of the entire analysis.

7. 850 Professional IC – solution for demanding
tasks
07
The 850 Professional IC System can be used both to
analyze acid baths and for trace analysis of impurities in
ultrapure water, rinsing solutions and adsorption solu-
tions. Because of the system’s self-monitoring functions
operating errors are virtually eliminated. Owing to the
complete automation, including Metrohm Inline Sample
Preparation (MISP), the system can be recommended
both for routine analysis and for complex applications in
research and development.
881 Compact IC pro – predestined for routine
analysis
The 881 Compact IC pro is the ideal solution for routine
analysis, if the focus is on only one application. Like the
850 Professional IC, the 881 Compact IC pro is also
equipped with intelligent hardware components. To-
gether with the MagIC NetTM ion chromatography
software the system enables intuitive operation. Just like
the 850 Professional IC, the 881 Compact IC pro can
be automated in various ways and complemented by
Metrohm Inline Sample Preparation Techniques.

8. Voltammetry
08 Voltammetry is an electrochemical analytical method
that provides information on – among other substances
797 VA Computrace
The 797 VA Computrace is a modern voltammetric meas-
– the type and amount of metals contained in a dissolved uring stand that is connected to a PC via a USB port. The
sample on the basis of a current-voltage relationship. The PC software provided controls the measurement, records
importance of voltammetry is based on its high degree of the measuring data and evaluates them. Due to the well-
accuracy and sensitivity, the possibility of speciation laid out program structure operation is amazingly easy.
analysis and the good price-to-performance ratio. The integrated potentiostat guarantees the highest
degree of sensitivity with a reduced amount of noise. The
Precise measurements even in the presence of unique Multi-Mode Electrode (MME) and rotating disk
high salt concentrations electrodes (RDE) made from various materials are availa-
The particular challenge for analysis in the electroplating ble as working electrodes.
sector are the large quantities of salts typically contained
in electroplating samples. For such samples, many meas- Convenient data management
uring techniques can at best provide unsatisfactory All the relevant measurement data and results obtained
results; others cannot provide any results at all. Here, with the 797 VA Computrace can be transferred very
electrochemical analysis is able to demonstrate its easily to your LIMS − as text data or in xml format.
strengths; the disadvantage for other methods is trans-
formed into a big advantage: large amounts of salt equal
good conductivity, which is a prerequisite for electro-
chemical analysis.
Furthermore, the infrastructure required for a voltammet-
ric measurement system requires hardly any expenditure.
All it needs is electricity and a supply of nitrogen. Ven-
tilation, flammable gases and associated safety require-
ments are no issues.

9. CVS (Cyclic Voltammetric Stripping)
Standard method in PCB manufacturing
Cyclic Voltammetric Stripping (CVS) and Cyclic Pulse
The main CVS applications in the electroplating
and semiconductor industries
09
Voltammetric Stripping (CPVS) are widely used methods
in the electroplating industry for the determination of Suppressor Brighteners Leveler
organic additives. The CVS method is an essential com- Process DT – Dilution • LAT – RC –
ponent of production control in many industrial coating Titration Linear Response
processes, especially in the manufacture of printed circuit Titration Curve
boards or semiconductors. Approximation
Techique
• MLAT –
With CVS or CPVS it is possible to determine the concen-
Modified
tration of additives exactly. The effective concentration of
Linear
the particular additive in the bath sample is shown Approximation
directly in mL additive per L bath. Precise subsequent Technique
dosing to meet the target concentration then becomes
possible. This ensures continuous, trouble-free operation
of the plant.
Complete voltammetry systems – the right system
for each application
Metrohm’s MVA systems are ready-to-use packages, your requirements, there are extended MVA accessory
which are customized to suit the needs of the electro- kits available for specific applications; use these to en-
plating and semiconductor industries. Depending on hance the capabilities of the MVA basic system.
MVA-12 – system for additive determination MVA-13 – fully automatic determination of
with CVS organic additives in sample series
The MVA-12 is the standard system for routine determi- The MVA-13 is the high-end system for the determina-
nation of organic additives in individual samples. Auto- tion of additives in electroplating baths with the samples
matic addition of auxiliary solutions such as VMS, inter- being added automatically by an 838 Advanced VA
cept or standard solutions is carried out with Dosinos. Sample Processor. The suppressor content of up to 56
For brightener determination the sample only has to be samples can be determined. When determining brighten-
added manually. In the case of suppressor determination, ers, up to 28 samples can be analyzed. Various methods
this is also done automatically. can also be combined in a single measuring procedure.

10. Potentiostats/Galvanostats by Metrohm Autolab
10 Systems for electrochemical analysis in research
and development
Autolab PGSTAT-potentiostats for all electro-
chemical methods
The electrochemical interface has been of particular inter- At the fundamental level, the Autolab PGSTAT provides
est in fundamental and applied research for many decades. the scientist with all the electrochemical methods of inter-
The understanding of the nature of the processes involved est for surface science. Potentiostatic and galvanostatic
at the electrochemical interface, from mass transport to control allow the researchers to accurately control the reac-
electron transfer kinetics, provides invaluable information tions taking place at the electrochemical interface as well
which can be used to optimize existing surface prepara- as the rate of these reaction and the quantity of material
tions processes and develop new methods. involved. Using these methods, the composition, rough-
ness, structure and growth mode of deposited materials
For example, Electrochemical Atomic Layer Deposition can be controlled.
(EALD) and Surface-Limited Redox Replacement (SLRR) are
two particular examples of novel electrochemical methods The Autolab EQCM module (Electrochemical Quartz
which are now used in technologically relevant applica- Crystal Microbalance) further extends the versatility of the
tions. Other novel electrochemical surface preparation Autolab PGSTAT. It provides the means to measure mass
2
techniques involve the use of the macromolecular assem- changes in the ng/cm range. This allows the users to
blies using dendrimers or nanoscale templating. detect the formation of the very first atomic layers on the
surface of a piezo-electric quartz sensor. With this technol-
ogy, the formation of metallic deposits during electrolytic
or electroless processes can be monitored in situ.

11. 11
Part II: Processes and application solutions
Quality control of basic chemicals and raw materials
Quality assurance in production begins when the basic chemicals used are checked. Analytical instruments from
Metrohm make it possible to establish the concentrations of acids or bases reliably, quickly and easily, determine the
metal content of various raw materials or detect any impurities in trace quantities.
Titrimetric applications Sample Titrant Metrohm Electrode
Sulfuric acid, hydrochloric acid, sodium hydroxide, H2SO4 c(NaOH) = 0.1 mol/L 6.0255.100 Profitrode
ammonia and hydrogen peroxide are some of the most HCl c(NaOH) = 0.1 mol/L 6.0255.100 Profitrode
frequently used basic chemicals in the electroplating NaOH c(HCl) = 0.1 mol/L 6.0255.100 Profitrode
industry. Normally their content is checked by means of NH4OH c(HCl) = 0.1 mol/L 6.0255.100 Profitrode
potentiometric titration when incoming goods are exam- H2O2 c(KMnO4) = 0.1 mol/L 6.0431.100 Pt Titrode
ined, to ensure the particular mixture is in the right pro-
portions for subsequent use or dilution.

12. 12 Ion chromatographic applications
Impurities in hydrogen peroxide, isopropanol, etc. Determination of ultratraces
Ion chromatographic applications are used to monitor When ultratraces need to be determined, Inline Precon-
etching, extracting and rinsing solutions. Analyses of im- centration is added to Inline Matrix Elimination. The re-
purities, e.g. in hydrogen peroxide or isopropanol, play a quirements here area are not only work that is free of
big role here. For this, an IC system is equipped with blank readings and of any carryover, but also exact meas-
Inline Matrix Elimination. This rules out any matrix effect urement of the preconcentration volume. All this is made
and makes reliable analysis possible. possible by the patented 800 Dosino. This state-of-the-
art liquid handling system provides complete flexibility in
the choice of injection volume and can be adapted at any
time to the required degree of sensitivity. At the same
time the method can be calibrated with just one stand-
ard solution.
chloride; 49.2 µg/L
1.16
1.14
1.12
1.10
Conductivity [µS/cm]
fluoride; 24.5 µg/L
1.08
1.06
nitrate; 24.8 µg/L
sulfate; 16.4 µg/L
1.04
phosphate; 6.6 µg/L
nitrite; 14.4 µg/L
bromide; 9.1 µg/L
1.02
1.00
0.98
0.96
0.94
0.92
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Time [min]
Determination of 30% hydrogen peroxide spiked respectively with 10 μg/L F¯, Cl–, NO2–, Br–, NO3–, PO43– and SO42–; column: Metrosep A
Supp 5 - 150/4.0; preconcentration column Metrosep A PCC 1 HC/4.0; eluent: 3.2 mmol/L Na2CO3 + 1.0 mmol/L NaHCO3, 0.8 mL/min;
column temperature: 25 °C; sample volume: 20 μL

13. Voltammetric applications Analytes Raw material
Traces of heavy metals in basic chemicals Zinc, cadmium, lead, nickel, cobalt Sodium hydroxide
Heavy metal ions present in the basic chemicals can Zinc, cadmium, lead, nickel, cobalt Hydrochloric acid
cause interference during the production process. For Iron Phosphoric acid
this reason, a purity check is carried out when goods are Iron, nickel, cobalt Sulfuric acid
received. Zink, lead, iron Copper sulfate
On the other hand, in the electroplating industry large
quantities of basic chemicals are used and as a result size-
able quantities of heavy metals are introduced into the
production process. This contamination needs to be pre-
vented as far as possible right at the start of the produc-
tion chain, to avoid the need to remove it at great cost
later. Such checks are a classic application of voltammetry.
Nickel in sodium hydroxide by means of
adsorptive stripping voltammetry (AdSV)
To analyze the concentration of nickel in a solution of
sodium hydroxide, the solution is first acidified to bring
the nickel into its ionic form. The pH is then adjusted to
9.6 with an ammonium chloride buffer. Dimethylglyoxime
(DMG) is added to produce a Ni-DMG complex, which
can be preconcentrated on the mercury dropping elec-
trode. Quantification is by means of standard addition.

14. 14
Metal production by means of electrodeposition
In metal production by means of electrodeposition, the high purity of the metals used is crucial for the quality of the
resulting surfaces. Metrohm offers you reliable methods to detect any impurities with highest precision.
Zinc electrolysis Analyte Sample
In the production of zinc the metal is deposited electro- Cadmium Zinc electrolyte
lytically on a cathode. The zinc electrolyte used contains Lead Zinc electrolyte
impurities due to heavy metals. Using voltammetry it is Copper Zinc electrolyte
possible to determine traces of heavy metals in the Thallium Zinc electrolyte
electrolyte reliably and, as a result, to monitor metal Arsenic Zinc electrolyte
deposition in the electroplating process with the required Nickel Zinc electrolyte
precision. Cobalt Zinc electrolyte
Iron Zinc electrolyte
Antimony(III) Zinc electrolyte
Germanium Zinc electrolyte
Selenium Zinc electrolyte

15. Metals as main components of electroplating baths
The concentration of metals in electroplating baths can vary considerably depending on intended purpose. The required 15
thickness of the coating, the nature of the material and market prices for the expensive noble metals are the key
parameters. The appropriate analytical technique is selected according to the concentration of the metal to be deter-
mined. Metrohm offers suitable systems for carrying it out.
Titrimetric applications Ion chromatography applications
Copper and nickel in acidic metal baths Silver and ammonium in etching baths containing
Multilayer systems are widespread in corrosion protec- hydrofluoric acid
tion. For example, corrosion-inhibiting nickel is applied Ion chromatography is often used to determine medium
on top of an intermediate layer of copper. In the deposi- to low concentrations of metals in etching solutions and
tion processes the concentration of the metal being electroplating baths. Because such solutions and baths
deposited is an important parameter for the electric cur- often contain high ionic matrices, Metrohm Inline Dilution
rent to be applied. If the concentrations are too low, a is used here. An example of a typical ion chromatography
stronger current has to be applied, which can drive up application is the determination of silver in the mg/L
the production costs significantly. range along with ammonium in the g/L range in etching
baths containing hydrofluoric acid.
The copper content in acidic copper baths is determined
by redox titration with c(Na2S2O3) = 0.1 mol/L, following
prior reduction of Cu(II) to Cu(I) by means of potassium
iodide. The nickel content is determined by way of com-
plexometric titration with c(Na2EDTA) = 0.1 mol/L.

16. 16
Voltammetric applications
Metal determination and speciation analyses in
electroplating baths
Of course, the concentration of the metal used as the
main bath component can also be determined by means
of voltammetry. In addition, it is possible to differentiate
between various oxidation states of metal ions or bet-
ween free and bound metal ions. Typical applications are:
Analyte Type of bath
Gold (I) Cyanidic gold bath
Palladium Activator
Chromium(III), chromium(VI) Chromium bath
Nickel Nickel bath
Cobalt Cobalt bath

17. Inorganic and organic secondary components of
electroplating baths
Organic and/or inorganic additives are included in electroplating baths to control the physical properties (ductility, 17
hardness, tear strength, brazeability, etc.) of the deposited metal layer. In the case of decorative electroplating, the
visual appearance of the surface is optimized with additives. Complexing agents are also added to baths to keep large
quantities of metal in solution.
Essentially, acids, bases and ions in low concentrations
can be used to influence the nature of the surfaces of
printed circuit boards, contacts, metal components etc.
These bath additives must be analyzed at regular inter-
vals, so the production process is most efficient and a
consistent end product quality ensured.

18. 18
Titrimetric analyses
Boric acid and tetrafluoroboric acid in nickel baths Surfactant determination in electroplating baths
Apart from chloride and sulfate, nickel plating baths also To improve surface properties, surfactants are added to
contain boric acid, which is used as a buffer to maintain electroplating baths, because they improve surface wet-
a certain pH value. Using potentiometric titration it is ting and emulsify brighteners. Standard anionic surfac-
possible to determine both the free boric acid and the tants (like, for example, in nickel baths) are determined by
free tetrafluoroboric acid. After addition of mannitol, the means of potentiometric titration with TEGO®trant A100
formed mannitol complexes are titrated with sodium and an «Ionic Surfactant» electrode.
hydroxide solution. The determination is carried out
directly in the plating bath sample; nickel and other
metal ions do not interfere.

19. Ion-chromatographic analyses
Concentrated acids in etching solutions
19
One of the uses of ion chromatography is to check the (0.25 μL) makes possible, for example, fully automatic
content of an electroplating bath. For this, the anion analysis of concentrated acid mixtures such as an etching
concentrations of the acids and acid mixtures used are solution containing 10% HF, 30% HNO3, 30% H2SO4 and
determined. The unique combination of Metrohm Inline 13% H3PO4.
Dilution Technique and a minimum injection volume
fluoride; 13.9%
80
70
nitrate; 29.3%
60
sulfate; 30.9%
Conductivity [µS/cm]
50
phosphate; 15.2%
40
sulfite; 8.1%
30
20
10
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Time [min]
Etching solution diluted inline 1:100, column: Metrosep A Supp 5 - 150/4.0; eluent: 3.2 mmol/L Na2CO3+ 1.0 mmol/L NaHCO3,
0.7 mL/min; sample volume: 0.25 μL (internal loop)

20. 20 Nitrate in nickel baths
Starter substances, catalysts or contamination from pre-
Organic acids in electroplating baths
Organic ionic and polar substances can also be deter-
vious steps in the μg/L to mg/L range can be determined mined using ion chromatography. Typical applications are
by way of ion chromatography for the purpose of proc- determinations of organic acids in electroplating baths.
ess control. For example, citric acid, formic acid and lactic acid in
the g/L range are monitored by means of ion-exclusion
One example here is the determination of nitrate in chromatography.
nickel baths to check the rinsing procedure and to iden-
tify unwanted contamination in a newly prepared nickel By contrast, ion-exchange chromatography is used to
electroplating bath. By using the intelligent Partial Loop determine organic acids together with inorganic compo-
Injection Technique it is possible to cover a concentration nents in electroplating baths or starter substances (e.g.
range of 1:10‘000 with a single calibration. The sample tartaric acid and citric acid together with hypophosphite
volume varies within the range 2 - 200 μL. and tungstate).
nitrate; 23.4 µg/L
1.10
1.08
1.06
Conductivity [µS/cm]
1.04
chloride; 2.0 µg/L
sulfate; 0.4 µg/L
1.02
nitrite; 1.4 µg/L
1.00
0.98
0.96
0.94
0.92
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Time [min]
Rinsing solution after bath cleaning; column: Metrosep A Supp 5 - 150/4.0; eluent: 3.2 mmol/L Na2CO3+ 1.0 mmol/L NaHCO3,
0.8 mL/min; column temperature: 25 °C; sample volume: 200 μL

21. Voltammetric applications Analyte Type of bath
Lead in nickel baths Lead, antimony, bismuth Nickel bath
Lead is added to nickel baths chemically as a stabilizer. In Cobalt, sulfite Gold bath
addition, it has a large effect on nickel deposition itself. Cobalt, cadmium, thallium Cyanide bath
The quantity of lead must be maintained in the low mg/L Chromium(III) / chromium(VI) Chromium bath
range, in order to be able to guarantee uniform deposi- Saccharin Acidic copper bath
tion of nickel. Using voltammetry, it is possible to monitor Thiourea Acidic copper bath
limits reliably, quickly and easily.
Antimony/bismuth in nickel baths
Increasingly, nickel baths are being treated with antimo-
ny and/or bismuth as an alternative to lead. Here too, the
use of voltammetry can be recommended.

22. 22
CVS and CPVS to determine organic additives Analyte Type of bath
Cyclic Voltammetric Stripping (CVS) and Cyclic Pulse Suppressor Acidic copper bath,
Voltammetric Stripping (CPVS) are widely used methods tin bath, tin-lead bath
in the electroplating industry for the determination of Brightener Acidic copper bath
organic additives. The CVS method is an essential com- Leveler Acidic copper bath
ponent of production control in many industrial coating
processes, especially in the manufacture of printed circuit
Determination of suppressor in acid copper with calibration curve
boards and semiconductors. DT determination of suppressor
Suppressor
15
10
I [mA]
5
0
-5
0 0.5 1.0 1.5
U [V]
Measuring curve for a suppressor determination –
dilution titration

23. Monitoring of wastewater and process water
In electroplating installations wastewater is produced at various points in the manufacturing process. Depending on 23
the step in the process (degreasing, electroplating, passivating, pickling, etc.), this wastewater might be highly toxic
and therefore require elaborate treatment, in order to eliminate any risks to humans and the environment. Strict
limits apply to the substances concerned and these need to be monitored throughout. Metrohm offers you numerous
solutions for analyzing process water and wastewater; with them you can optimize the productivity of your proc-
esses and ensure optimized compliance with environmental legislation.
pH and conductivity measurement in wastewater
Whether directly within the process or in the laboratory,
the pH value can always be determined quickly and
reliably with the 826 pH mobile or the 827 pH lab and
the Unitrode. With the 856 Conductivity Module and the
867 pH Module it is possible to determine not only the
pH value, but also the conductivity – if necessary, also as
part of a measurement in the same vessel.

24. 24 Ion chromatographic applications
Trace analysis to monitor wastewater and rinsing
water
The advantages of ion chromatography are most appar- An example of this is ultratrace analysis of anions and
ent in the monitoring of wastewater, rinsing water and cations in ultrapure water. Reliable results, unaffected by
process water. Because of its versatility a wide range of interferences, are possible if Metrohm Inline Preconcen-
questions concerning compliance with environmental tration is used in combination with Inline Calibration.
regulations, effectiveness of cleaning steps or quality
requirements can be answered during production. Fur-
thermore, ion chromatography makes it possible to
detect impurities, carryover or discharges right down to
the ng/L range.
lithium; 254 ng/L
1.1
1.0
monoethylamine (MEA); 502 ng/L
ammonium; 332 ng/L
0.9
Conductivity [µS/cm]
0.8
diethylamine (DEA); 478 ng/L
triethylamine (TEA); 465 ng/L
sodium; 260 ng/L
0.7
potassium; 226 ng/L
0.6
0.5
0.4
0.3
0.2
0.1
0 1 2 3 4 5 6 7 8 9 10 11 12
Time [min]
Fully automatic and precise analysis of cation traces of ion exchange eluates: column: Metrosep C 3 - 150/4.0; preconcentration
column: Metrosep C PCC 1 HC/4.0; eluent: 2.5 mmol/L HNO3, 1.0 mL/min; column temperature: 45 °C; sample volume: 10.0 mL

25. 25
Voltammetric applications Analyte Sample
Heavy metal analysis in wastewater and process Tin Wastewater, process water
water Iron Wastewater, process water
The strict regulations for environmentally compatible and Zinc, cadmium, lead, copper Wastewater, process water
efficient use of metals have always had a great impact on Nickel, cobalt Wastewater, process water
the operation of electroplating installations. With the Chromium(total) Wastewater, process water
797 VA Computrace you are fully able to satisfy the re- Mercury Wastewater
quirements for heavy metal analysis in wastewater. Arsenic Wastewater
NTA, EDTA Wastewater
Not only wastewater, but also the process waters used Thallium Process water
need to meet strict criteria, depending on the particular Selenium Process water
use. Whether you are determining the concentration of
iron in boiler feed water or monitoring traces of metal in
(rinsing) waters due to carryover – with voltammetric
system solutions from Metrohm you are on the safe side.

26. Part III:
Solutions for atline and online analysis
26 Atline process analysis with ProcessLab
Process monitoring in electroplating ProcessLab – robust, flexible and easy to use
In the electroplating process material is continuously ProcessLab is a robust and easy-to-use analysis system
being deposited on the workpieces. To ensure that the that is operated directly at the process line. With an IP 54
quality of the treated surfaces is consistent, the concen- protection classification the system is able to withstand
tration of the relevant bath ingredients and the reaction even the harshest process conditions. The analysis system
products must not exceed or drop below the defined consists of a touch-screen TFT control unit, a customized
tolerance limits. This demands close process monitoring, analysis module and a sample delivery station. All mod-
which is normally carried out using wet chemical analyses. ules are based on proven components from the Metrohm
range and are combined specifically for each customer
It is a great advantage if samples do not first have to be according to applications.
taken to a laboratory, but can be analyzed directly on the
production floor by shift personnel. This allows the yield Samples are taken from the process manually by the
of the raw materials used to be optimized and the plant operating personnel and held ready. Analysis on the
to be operated at maximum efficiency. ProcessLab is started by a single touch of the touch-
screen and then proceeds fully automatically. Process
integration comes with the usual process signals.
After analysis, the measurement data are passed on
directly to the plant’s process control system. The meas-
urement data are shown on the ProcessLab with the
appropriate action and warning limits.
Especially when samples have to be taken at different measuring points in the process and implementation of an online
solution is ruled out for reasons of cost, ProcessLab provides an ideal solution for fast and reliable process control.

27. 27
Combination of analytical methods Incorporation of instruments from other manu-
ProcessLab combines various analytical methods on a facturers
minimal footprint: titration, direct potentiometry, voltam- Many process baths are mixtures of several substances
metry, photometry and spectroscopy. The same principle that cannot be determined using the usual wet chemical
applies throughout: fully automatic processing of samples analysis methods. ProcessLab provides a number of inter-
with robust and proven modules and thus process con- faces for incorporating instruments from other manufac-
trol with minimized errors. turers to determine density, surface tension or refractive
index. These samples also are delivered by ProcessLab
Consequently, entire process chains can be monitored and the analyzers are cleaned, checked and calibrated
with a single system – from pretreatment to finishing fully automatically. The results are transferred together
baths and on to wastewater monitoring. The perform- with the other parameters to the database and transmit-
ance of the individual subprocesses can be increased by ted to the process control system by way of the Process-
the individual frequency of samples; Thus, the baths can Lab interfaces.
be operated within the optimum parameters and, as a
result, the required product quality can be guaranteed.

28. Application examples
28 Monitoring electroless nickel baths:
nickel sulfate, hypophosphite and pH value
Monitoring alkaline zinc baths:
zinc, sodium hydroxide and carbonate
Electroless nickel baths are used for various applications. To protect iron and steel components from corrosion,
The advantages of chemical nickel deposition are even zinc continues to be the main material used as a protec-
distribution of the coating as well as the possibility to use tive coating. The plating baths deposit zinc on the com-
it with rack and barrel facilities. ponents electrolytically, thereby ensuring that the materi-
als have a long life. The finishing baths are alkaline; over
In electroless deposition processes the electrons required time the concentration of carbonates in them increases,
to reduce the metal ions are generated by a chemical impairing the deposition properties and cost efficiency of
process in the solution. The reagents used have to be the process. The zinc that has been deposited has to be
topped up to achieve even deposition. Increasing salt replaced, so the parts being galvanized are coated evenly.
concentrations of the unincorporated ions in the solution The entire process chain, from cleaning of the compo-
can impair the coating properties or the rate of deposi- nents in degreasing baths and galvanizing through to
tion. These increases in salt concentration must be moni- passivating of the zinc coating on the finished item can
tored in order to prolong the bath-life through regene- be monitored with ProcessLab.
rative measures. ProcessLab ensures economic and envi-
ronmentally aware production throughout the process
chain.
Schematic diagram of the various process stages in electrogalvanization. The various baths are:
1: Acid degreasing bath
2 + 3: Rinsing baths
4: Acid pickling bath
5 + 6: Rinsing baths
7: Alkaline zinc bath
8 + 9: Rinsing baths
10: Passivating bath
11 + 12: Rinsing and cleaning baths

29. 29
Monitoring acidic copper baths in semiconductor Monitoring a phosphatizing process
production In the various cleaning, degreasing and rinsing baths and
The most important processing bath in the production of also in the phosphatizing bath itself the various parame-
printed circuit boards (PCBs) is the acidic copper bath. ters involved must be adhered to exactly. Those deter-
The components that are contained therein and need to mined in the degreasing and rinsing baths are pH value,
be monitored are copper, sulfuric acid, chloride and also conductivity, free alkalinity and total alkalinity, while the
organic bath additives such as suppressors and brighten- phosphatizing bath is analyzed for free and total acids,
ers. While the concentrations of copper, sulfuric acid and accelerator, zinc and fluoride.
chloride are determined titrimetrically, Cyclic Voltammetric
Stripping (CVS) and Cyclic Pulse Voltammetric Stripping ProcessLab monitors, records and documents all the
(CPVS) are used to analyze the organic bath additives. important analytical parameters of the phosphatizing
process. The combining of the analytical methods within
ProcessLab records all components centrally, thereby one system as well as the intuitive handling via the well-
allowing the entire production facility to be monitored arranged user interface ensure easy and reliable monitor-
quickly and efficiently. ing of the entire process.

30. Online process analysis
30 Customized process control
Online analyzers from Applikon Analytical are designed
Robust design
Applikon analyzers are designed for the rigorous demands
for continuous operation and enable fully automatic of the production environment. The housings meet the
monitoring of process baths in electroplating and PCB specifications of NEMA 4 and protection class IP66.
manufacturing – round the clock, seven days a week.
There are no limits: whether your requirement is for one
sample stream or several sample streams, for a single
parameter or multiple parameters, Applikon Analytical
will configure the right system for you. Of course, your
wastewater treatment can also be controlled or moni-
tored with online analyzers from Applikon Analytical.
Proven wet chemistry methods
Applikon Analytical online analyzers are based on wet
chemistry methods such as titration, photometry and
measurements with ion-selective electrodes. For these
methods, sampling and sample preparation are at least
as important as the analysis itself. Applikon Analytical has
great expertise in this field and configures the sampling
system to exactly fit your application including, e.g., fil-
tration, sample taking from pressurized containers or
degassing.
All Applikon Analytical online analyzers come with digital
and analog data outputs. Thus, results can be transmit-
ted using the usual process signals and alarms triggered
by digital outputs. Or digital inputs can be employed for
remote start/stop commands.
ADI 2040 explosion-proof with reagent cabinet

31. 31
Application examples
The majority of laboratory methods can be adapted to Acidic components of etching baths
the requirements in an online system as they are. Some Online analyzers from Applikon Analytical can also be
typical applications in the electroplating industry and PCB used to monitor the composition of acidic etching baths.
manufacturing are described below: By integrating different measuring methods within a
single analytical system and developing analytical meth-
Heavy metals in wastewater ods for each individual process bath it is usually possible
Wastewater from the electroplating and electronics to monitor the entire facility with just one ADI 2040
industries is normally polluted with metals, including heavy system.
metals, e.g., copper, nickel and cobalt. The ADI 2045 Vol-
tammetric Analyzer from Applikon Analytical is an online Composition of electroplating baths
system that ensures continuous monitoring of the concen- The ADI 2040 system can be recommended for fully
tration of these and other metals. In addition, non-metal automatic monitoring of nickel electroplating baths.
components, such as hydrazine, can also be monitored. Apart from quantifying the nickel content, it also allows
measurement of hypophosphite.

32. 32
Service you can rely on – Metrohm Quality Service®
Reliable results for the lifetime of your analytical Metrohm Compliance Service®
instruments Benefit from the Metrohm Compliance Service® when it
Whether your field is electroplating or PCB manufactur- comes to the professional Initial Qualification of your
ing – you must always be able to rely on your process analytical instruments. Initial Qualification/Operational
control. Systems that are installed and commissioned by Qualification carried out by our experts saves you time
professionals and maintained on a regular basis ensure a and money, as your analytical system is configured
maximum degree of reliability. according to your needs and put into operation fast and
reliably.
®
Relying on the Metrohm Quality Service gives you peace
of mind from the very start. From the professional instal- Initial instructions and user trainings ensure error-free
lation of your instruments to regular maintenance care operation of your new instruments by your staff. The
and – should a failure ever occur – instant quality repairs, Metrohm Compliance Service® includes comprehensive
we do everything to make sure that you can rely 100 documentation and guarantees compliance with the
percent on results produced during the entire lifetime of standards of quality management systems such as GLP/
your Metrohm instruments. GMP and ISO.

33. 33
®
Metrohm Quality Service
Metrohm’s worldwide Quality Service®, especially sched- A full service contract, for example, offers you optimum
uled and preventive maintenance, extends the lifetime of certainty for work without any worries, while giving you
your analysis systems. Qualified service technicians with complete control of costs and providing fully compliant
proof of training carry out the maintenance work. You documentation.
can choose between different types of service contracts.
Metrohm Quality Service® at a glance
®
Metrohm Quality Service Customer benefits
Application support by means of Application Bulletins,
Application Notes, monographs, validation brochures,
Fast and professional resolution of all application issues
technical posters and scientific/technical articles
and complex analytical challenges
Personal consultation by our specialists via e-mail or
telephone
Training Competent users contribute to the reliability of results
Accurate measurement results Documentary evidence
Certified calibrations, e.g. of dosing and exchange units
to comply with regulations and for efficient audits
Remote maintenance Fast resolution of software issues
Backup support High data securityt
Short response time and thus rapid resolution of
Emergency services, e.g. express repairs on-site
problems and minimization of downtime
Spare parts, made in Switzerland by Metrohm and
Sustainable repair success, short delivery times,
available worldwide, with guarantee spare parts
minimization of downtimes
availability ten years after instrument discontinuation
Regional repair workshops available worldwide and a
Instruments soon available for use again
central workshop at the manufacturer’s premises
Metrohm Quality Service® ensures reliable measure-
ment results − throughout the life of an analyzer

34. Ordering information
34 Instruments for titration
2.827.021X 827 pH lab with Unitrode
2.826.0010 826 pH mobile
2.848.0010 848 Titrino plus
2.801.0040 801 Magnetic stirrer with support
2.862.0010 862 Compact Titrosampler
2.800.0010 800 Dosino
2.905.2020 Plate Titrando
The Plate Titrando offers you a complete package for the most common analyses of plating baths.
Apart from the titration software tiamoTM light and determination methods described in detail,
you will also receive comprehensive accessories for your titrations.
2.856.0010 Conductivity Module – conductivity measuring module for upgrading Titrando systems or use as
stand-alone unit in combination with a 900 Touch Control.
Electrodes and buffer solutions
6.0255.100 Profitrode – comb. pH electrode with DJ reference system for titration
6.0258.010 Unitrode with Pt1000 temperature sensor (fixed cable) for measuring pH
6.0430.100 Ag Titrode for precipitation titrations with AgNO3
6.0431.100 Pt Titrode for redox titrations
6.0507.120 «Ionic Surfactant» electrode for titration of anionic and cationic surfactants
6.0750.100 LL ISE Reference
6.0915.130 Five-ring conductivity measuring cell, c = 1.0 cm–1
6.2104.020 Electrode cable 1 m
6.2106.020 Electrode cable for LL ISE Reference
6.2307.230 Buffer solutions pH 4/7/9 (3 x 10 x 30 mL)
Intelligent Exchange Units for the 848 Titrino plus
6.3026.110 Exchange Unit 1 mL
6.3026.150 Exchange Unit 5 mL
6.3026.210 Exchange Unit 10 mL
6.3026.220 Exchange Unit 20 mL
6.3026.250 Exchange Unit 50 mL
Intelligent Dosing Units for the Titrando / 862 Compact Titrosampler
6.3032.120 Dosing Unit 2 mL
6.3032.150 Dosing Unit 5 mL
6.3032.210 Dosing Unit 10 mL
6.3032.220 Dosing Unit 20 mL
6.3032.250 Dosing Unit 50 mL

35. Instruments for ion chromatography
2.850.2030 850 Professional IC Anion – MCS
35
2.850.1010 850 Professional IC Cation
2.850.3030 850 Professional IC AnCat – MCS
2.881.0030 881 Compact IC pro Anion
2.881.0010 881 Compact IC pro Cation
2.858.0030 858 Professional Sample Processor with peristaltic pump and valve
2.863.0010 863 Compact IC Autosampler
ProfIC 4 Fully automatic Professional IC System for inline dilution
ProfIC 5 Fully automatic Professional IC System for inline preconcentration
ProfIC 9 Fully automatic Professional IC System for inline matrix elimination
6.1006.520 Metrosep A Supp 5 - 150/4.0
6.1006.500 Metrosep A Supp 415 Guard/4.0
6.1010.450 Metrosep C 3 Guard - 150/4.0
6.1006.310 Metrosep A PCC 1 HC/4.0
6.1010.310 Metrosep C PCC 1 HC/4.0
Instruments for voltammetry
2.797.0010 797 VA Computrace for voltammetric trace analysis. With Multi-Mode Electrode (MME), Ag/AgCl
reference electrode and platinum auxiliary electrode.
MVA-02 Analysis system for voltammetric trace analysis and training. With two 800 Dosinos for automatic
addition of auxiliary and standard solutions.
MVA-03 Fully automatic analysis system for voltammetric trace analysis and training. With 863 Compact
VA Autosampler and two 800 Dosinos for fully automatic analysis of small series of samples.
2.797.0030 797 VA Computrace for CVS (Cyclic Voltammetric Stripping) for the analysis of additives in
electroplating baths. With rotating platinum disk electrode (Pt-RDE), Ag/AgCl reference electrode
and platinum auxiliary electrode.
MVA-12 Semi-automatic 797 VA Computrace system for the determination of organic additives by way
of CVS. With three 800 Dosinos for automatic addition of auxiliary solutions and sample.
MVA-13 Fully automatic 797 VA Computrace System for the determination of organic additives by way of
CVS. With an 838 Advanced VA Sample Processor, three 800 Dosinos and rinsing kit. For sample
series of up to 56 samples.

36. Subject to change
Layout by Ecknauer+Schoch ASW, printed by Metrohm AG, CH-9101 Herisau
8.000.5030EN – 2010-06
surface.metrohm.com