Introduction to chromatography, Definition of Chromatography, Types of column chromatography, Theory of chromatography, Practical considerations in column chromatography , Factors affecting efficiency of a column, Applications.
This presentation contains all the topics related to column chromatography. That includes introduction, principle,apparatus, experimental aspects of column chromatography, application of column chromatography, advantage and disadvantage of column chromatography with reference.
Introduction to chromatography, Definition of Chromatography, Types of column chromatography, Theory of chromatography, Practical considerations in column chromatography , Factors affecting efficiency of a column, Applications.
This presentation contains all the topics related to column chromatography. That includes introduction, principle,apparatus, experimental aspects of column chromatography, application of column chromatography, advantage and disadvantage of column chromatography with reference.
ION EXCHANGE CHROMATOGRAPHY
ByM.Vharshini
B.Sc. Bio Medical Science
Sri Ramachandra University
ION EXCHANGE CHROMATOGRAPHY
Ion-exchange chromatography is a process that allows the separation of ions and polar molecules based on their affinity to the ion exchanger.
It can be used for almost any kind of charged molecule including large proteins, small nucleotides and amino acids.
Cations or Anions can be separated using this method.
PRINCIPLE
It is based on the reversible electrostatic interaction of ions with the separation matrix (i.e.)
The separation occurs by reversible exchange of ions between the ions present in the solution and those present in the ion exchange resin.
CLASSIFICATION OF RESINS
According to the chemical nature they classified as-
1. Strong cation exchange resin
2. Weak cation exchange resin
3. Strong anion exchange resin
4. Weak anion exchange resin
According to the Source they can -
Natural resins : Cation - Zeolytes, Clay
Anion - Dolomite
Synthetic resins: Inorganic & Organic resins
◘Organic resins are polymeric resin matrix.
The resin composed of –
Polystyrene (sites for exchangeable functional groups)
Divinyl benzene(Cross linking agent)-offers stability.
Ion exchange resin should have following requirements
»It must be chemically stable.
»It should be insoluble in common solvents.
» It should have a sufficient degree of cross linking.
»The swollen resin must be denser than water.
»It must contain sufficient no. of ion exchange groups.
Physical properties of ion exchange resins
Cross linking:
It affects swelling & strength & solubility
Swelling:
When resin swells, polymer chain spreads apart
Polar solvents → swelling
Non-polar solvents → contraction
Swelling also affected electrolyte concentration.
Particle size and porosity
Increase in surface area & decrease in particle size will increase the rate of ion exchange.
Regeneration
Cation exchange resin are regenerated by treatment with acid, then washing with water.
Anion exchange resin are regenerated by treatment with NaOH, then washing with water until neutral.
EXPERIMENTAL SETUP OF ION EXCHANGE CHROMATOGRAPHY
Metrohm 850 Ion chromatography system
Instrumentation of ion exchange chromatography
PRACTICAL REQUIREMENTS
1.Column
» glass, stainless steel or polymers
2.Packing the column
» Wet packing method:
A slurry is prepared of the eluent with the stationary phase powder and then carefully poured into the column. Care must be taken to avoid air bubbles.
3.Application of the sample
After packing, sample is added to the top of the stationary phase, use syringe or pipette.
This layer is usually topped with a small layer of sand or with cotton or glass wool to protect the shape of the organic layer from the velocity of newly added eluent.
4.Mobile phase
Acids, alkalis, buffers…
6.Stationary phase
The ionic
It is instrumental analytical technique. it is one of the major type of chromatography technique. its basic principle is adsorption. it has many applications in various fields
Introduction
Definition
History
Types of chromatography
Principle of column chromatography
Types of column chromatography
Process of column chromatography
Requirement
Procedure
Precautions
Applications
Advantage of Column chromatography
Disadvantage of Column chromatography
Conclusion
References
HPTLC- Principle, Instrumentation and Software (Abhishek Gupta)Abhishek Gupta
HPTLC is the improved method of TLC which utilizes the conventional technique of TLC in more optimized way
It is also known as planar chromatography or Flat-bed chromatography.
ION EXCHANGE CHROMATOGRAPHY
ByM.Vharshini
B.Sc. Bio Medical Science
Sri Ramachandra University
ION EXCHANGE CHROMATOGRAPHY
Ion-exchange chromatography is a process that allows the separation of ions and polar molecules based on their affinity to the ion exchanger.
It can be used for almost any kind of charged molecule including large proteins, small nucleotides and amino acids.
Cations or Anions can be separated using this method.
PRINCIPLE
It is based on the reversible electrostatic interaction of ions with the separation matrix (i.e.)
The separation occurs by reversible exchange of ions between the ions present in the solution and those present in the ion exchange resin.
CLASSIFICATION OF RESINS
According to the chemical nature they classified as-
1. Strong cation exchange resin
2. Weak cation exchange resin
3. Strong anion exchange resin
4. Weak anion exchange resin
According to the Source they can -
Natural resins : Cation - Zeolytes, Clay
Anion - Dolomite
Synthetic resins: Inorganic & Organic resins
◘Organic resins are polymeric resin matrix.
The resin composed of –
Polystyrene (sites for exchangeable functional groups)
Divinyl benzene(Cross linking agent)-offers stability.
Ion exchange resin should have following requirements
»It must be chemically stable.
»It should be insoluble in common solvents.
» It should have a sufficient degree of cross linking.
»The swollen resin must be denser than water.
»It must contain sufficient no. of ion exchange groups.
Physical properties of ion exchange resins
Cross linking:
It affects swelling & strength & solubility
Swelling:
When resin swells, polymer chain spreads apart
Polar solvents → swelling
Non-polar solvents → contraction
Swelling also affected electrolyte concentration.
Particle size and porosity
Increase in surface area & decrease in particle size will increase the rate of ion exchange.
Regeneration
Cation exchange resin are regenerated by treatment with acid, then washing with water.
Anion exchange resin are regenerated by treatment with NaOH, then washing with water until neutral.
EXPERIMENTAL SETUP OF ION EXCHANGE CHROMATOGRAPHY
Metrohm 850 Ion chromatography system
Instrumentation of ion exchange chromatography
PRACTICAL REQUIREMENTS
1.Column
» glass, stainless steel or polymers
2.Packing the column
» Wet packing method:
A slurry is prepared of the eluent with the stationary phase powder and then carefully poured into the column. Care must be taken to avoid air bubbles.
3.Application of the sample
After packing, sample is added to the top of the stationary phase, use syringe or pipette.
This layer is usually topped with a small layer of sand or with cotton or glass wool to protect the shape of the organic layer from the velocity of newly added eluent.
4.Mobile phase
Acids, alkalis, buffers…
6.Stationary phase
The ionic
It is instrumental analytical technique. it is one of the major type of chromatography technique. its basic principle is adsorption. it has many applications in various fields
Introduction
Definition
History
Types of chromatography
Principle of column chromatography
Types of column chromatography
Process of column chromatography
Requirement
Procedure
Precautions
Applications
Advantage of Column chromatography
Disadvantage of Column chromatography
Conclusion
References
HPTLC- Principle, Instrumentation and Software (Abhishek Gupta)Abhishek Gupta
HPTLC is the improved method of TLC which utilizes the conventional technique of TLC in more optimized way
It is also known as planar chromatography or Flat-bed chromatography.
TLC-Introduction, Principle, Procedure, and Applications.
Paper Chromatography-Introduction, Principle, Procedure, and Applications.
Column Chromatography-Introduction, Principle, Procedure, and Applications.
The present slide gives us an insight into the different aspects of application of columnn chromatrography the principle behind it and at the same time its recent advances.
Chromatography is a powerful and advanced techniques for separating mixtures. Many types of chromatographic techniques are known, such as paper, thin layer, column chromatography, each with its own strength and weakness.
Chromatography system in general have a stationary phase and a mobile phase.
In column chromatography both phases are placed in a column container, i.e. all the chromatographic operations are carried out using column.
Column chromatography in chemistry is a method using for the Identification, separation and purify individual chemical compounds from mixtures of compounds in the large amount.
Column Chromatography is a separation technique in which components of mixture is separated by using a glass column packed with stationary phase and liquid mobile phase flowing continuously through the column.
It is suitable for the physical separation of gram quantities of material. A solvent acts as the mobile phase while a finely divided solid surface acts as the stationary phase.
Usually a glass tube with a diameter from 1cm to 10cm and a height of 20 cm to 50cm with a tap at the bottom, is used for this purpose.
Depending upon the flow of solvent down, column chromatography may be separated into two categories.
Gravity column chromatography
If the solvent is allowed to flow down the column by Gravity, or downward process, it is known as gravity column chromatography .
Flash chromatography
If the solvent is forced down the column by positive air pressure , it is called flash chromatography.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
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The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
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Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
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2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
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2. INTRODUCTION
Chromatography is the separation of a mixture into individual
components using a stationary phase and a mobile phase.
When a column of stationary phase is used,the technique is called as
column chromatography.
Based on the nature of stationary phase i.e whether it is solid or
liquid,it is called as column adsorption chromatography or column
partition chromatography.
3. PRINCIPLE:
A solid stationary phase and a liquid mobile phase is used and the
principle of separation is adsorption.
When a mixture of components dissolved in the mobile phase is
introduced into the column,the individual components move with
different rates depending upon their relative affinities.
The compound with lesser affinity towards the stationary
phase(adsorbent) moves faster and hence it is eluted out of the column
first.
The one with greater affinity towards the stationary
phase(adsorbent)moves slower down the column and hence it is eluted
later.thus the component are separated.
4. . The rate of movement of a component(R) is given as follows-
R= Rate of movement of a component
Rate of movement of mobile phase
5. PRACTICAL REQUIREMENTS
1) Stationary phase(Adsorbent)
2) Mobile phase
3) Column characteristics
4) Preparation of column
5) Introduction of sample
6) Development technique(elution)
7) Detection of components
6. STATIONARY PHASE(ADSORBENT)
Various adsorbent used in column chromatography are as follows-
Sucrose
Starch
Talc
CaCO3
Activated Mg silicate
Activated charcoal
Activated alumina
7. MOBILE PHASE
Mobile phase is very important and they serve several functions. They act as
solvent,developer and as eluent.the functions of a mobile phase are-
To introduce the mixture into the column- AS SOLVENT
To develop the zones for separation-As developing agent
To remove pure component out of the column- As eluent
Various mobile phases are used as follows-
Petroleum ether
Carbon tetrachloride
Benzene
Toluene
Alcohols etc.
8. COLUMN
CHARACTERISTICS
The material of the column is mostly good quality neutral
glass since it should not be affected by solvents, acids or
alkalies.
The length of the column depends upon:
Affinity of compounds towards the adsorbent used.
Number of compounds to be separated.
Type of adsorbent used.
Quality of the sample.
9. PREPARATION OF THE COLUMN
The bottom portion of the column is packed with cotton wool or glass
wool or may contain a asbestos pad, above which the column
adsorbent is packed.A whatman filter paper disc can also be used.
After packing the column with the adsorbent,a similar paper disc is
kept on the top,so that the adsorbent layer is not disturbed during the
introduction of sample or mobile phase.Disturbance in the layer of
adsorbent will lead to irregular bands in separation .
10. INTRODUCTION OF SAMPLE
The sample which is usually a mixture of components is dissolved in
minimum quantity of the mobile phase used for preparing the column
or a solvent of minimum polarity.
The entire sample is introduced into the column at once and gets
adsorbed on to the top portion of the column.
From this zone, the individual samples can be separated by a process
of elution.
11. DEVELOPMENT TECHNIQUE(ELUTION)
After the introduction of the sample, by elution techniques,the individual
components are separated out from the column. The two techniques are-
1)Isocratic elution technique
In this elution technique,the same similar solvent composition or
solvent of same polarity is used throughout the process of separation
Eg.chloroform
2)Gradient elution technique
In this elution technique,solvents of gradually increasing polarity or
increasing elution strength are used during the process of separation.initially
low polar solvent is used followed by gradually increasing the polarity to a
more polar solvent.
12. DETECTION OF COMPONENTS
The detection of coloured components can be done visually.
Different coloured bands are seen moving down the column which can
be collected separately.
But for colourless compounds,the technique depends upon the
properties of the components.different properties which can be used
are-
1)Absorption of light(UV/Vis): using UV/Vis detector
2)Flourescence or light emission characteristics: using fluorescence
detector
3)By using flame ionisation detector
4)Evaporation of the solvent and weighing the residue.
13. APPLICATION
Separation of mixture of compounds.
Removal of impurities or purification process.
Isolation of active constituents.
Isolation of metabolites from biological fluids.
Estimation of drugs in formulations or crude extracts
14. ADVANTAGES
Any type of mixture can be separated by column chromatography
Any quantity of the mixture can be separated
Wider choice of mobile phase
Automation is possible
DISADVANTAGES
Time consuming method.
More amount of solvents are required which are expensive
Automation makes the technique more complicated and expensive.