This document provides an overview of analytical techniques used in chemistry, including both classical and instrumental methods. Classical methods involve qualitative and quantitative analysis using chemical tests, flame tests, and titration. Instrumental methods discussed include various types of spectroscopy such as infrared spectroscopy, nuclear magnetic resonance spectroscopy, and chromatography techniques used for separation analysis. Specific analytical techniques are described including their applications and mechanisms. Key concepts covered include electromagnetic radiation, molecular vibration, factors that influence infrared absorption frequencies, and interpreting infrared spectra to determine functional groups in organic compounds.
Introduction, electromagnetic radiation, units, electromagnetic and absorption spectra, Lambert’s and Beer’s laws, deviations from Lambert’s–Beer’s law, chromophores and auxochromes, absorption and intensity shift, types of electronic transition, effects of solvents,
electronic transition in polyenes, instrumentation, colorimetry, Woodward-Fieser rules for
calculating absorption maximum, analysis of mixtures, applications of ultraviolet and visible
spectroscopy in quantitative analysis of drugs, use of ultra violet and visible spectroscopy in
structural analysis.
Introduction, electromagnetic radiation, units, electromagnetic and absorption spectra, Lambert’s and Beer’s laws, deviations from Lambert’s–Beer’s law, chromophores and auxochromes, absorption and intensity shift, types of electronic transition, effects of solvents,
electronic transition in polyenes, instrumentation, colorimetry, Woodward-Fieser rules for
calculating absorption maximum, analysis of mixtures, applications of ultraviolet and visible
spectroscopy in quantitative analysis of drugs, use of ultra violet and visible spectroscopy in
structural analysis.
Uv-Vis spectroscopy: electronic spectroscopy, absorption and emission, Terms describing UV absorptions, absorbing species containing s,n and pi, absorbing species,sigma and pi orbitals, electronic transitions, Absorption: physical Basis and lineshape,UV-Spectra.
Uv-Vis spectroscopy: electronic spectroscopy, absorption and emission, Terms describing UV absorptions, absorbing species containing s,n and pi, absorbing species,sigma and pi orbitals, electronic transitions, Absorption: physical Basis and lineshape,UV-Spectra.
Infrared spectroscopy (IR spectroscopy or vibrational spectroscopy) is the measurement of the interaction of infrared radiation with the matter by absorption, emission, or reflection. It is used to study and identify chemical substances or functional groups in solid, liquid, or gaseous forms.
Infrared spectroscopy is technique to identify the functional group of the molecule.
In Infrared spectroscopy there are two main region finger print region and functional group region. Most of the molecules identifies In the finger print region due to that it is complex region.
Now we will see the
principle of IR spectroscopy:
IR spectroscopy is vibrational energy level changes when IR radiation passes through the material.
Infrared Spectroscopy and UV-Visible spectroscopyPreeti Choudhary
Instrumentation of Infrared Spectroscopy and UV-Vis spectroscopy
Discuss the fundamentals and concepts behind Infrared and UV-Vis spectroscopy.
I hope this presentation helpful for you.
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ATOMIC AND MOLECULAR SPECTROSCOPY, It includes an overview about the spectroscopy and and its uses plus about the whole spectrum. I hope it will help you a lot.
OUTLINE IS:
General Introduction
What is spectroscopy and spectrophotomer?
Electromagnetic Radiation and its parameters
UV/VISIBLE Spectroscopy and its principle
Beer Lambert Law and Conjugation
IR Spectroscopy
Applications of IR/UV/VISIBLE In Astronomy
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
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”.
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
1. Classicalmethod
Analytical
Techniques
Classical
method
Qualitative analysis
Quatitative analysis
Chemical test
Flame test
Titration
Gravimetric
Instrumental
method
Spectroscopy analysis
Separation analysis
Nuclear Magnetic Resonance Spectroscopy
Atomic Absorption/Emission Spectroscopy
InfraRed /UV Spectroscopy
Mass Spectroscopy
High Performance Liquid Chromatography
Gas Liquid Chromatography
Paper/Thin Layer/Column Chromatography
AnalyticalTechniques
QuatitativeanalysisQualitative analysis Separation analysis
Flame test
Chemical test
Melting/boiling
point
Gravimetric Titration Distillation Precipitation
Study on Identification,StructuralDetermination,
Quantification and Separation
Involve Qualitative and Quantitative analysis
• Quantitative – Amt present in sample/mix
• Qualitative – Identity species present in impure sample
• Structural – Determination ofstructure of molecule
• Separation of mix – Chromatographic Techniques
• Identification of functional gps
• Purity of substances
2. • Spectroscopymeasuresinteractionof moleculeswith electromagneticradiation
• Particles(molecule,ion, atom) can interact/absorba quantumof light
Spectroscopy
Electromagnetic
Radiation
Nuclear spin
High Energy Radiation
Gamma/X ray
Transitionof
innerelectrons
UV or visible
Transitionof outermost
valenceelectrons
Infrared
Molecularvibration
Microwave
Molecularrotation
Radiowaves
Low Energy Radiation
InfraredSpectroscopy Nuclear MagneticResonance
Spectroscopy
Ultra Violet
Spectroscopy
Atomic Absorption
Spectroscopy
Velocity of light (c ) = frequency (f) x wavelength (λ) - c = f λ
• All electromagnetic waves travel at speed of light (3.00 x 108
ms-1
)
• Radiation with high ↑ frequency – short ↓ wavelength
• Electromagnetic radiation/photon carry a quantum of energy given by
E = hf
hc
E
h = plank constant = 6.626 x 10-34
Js
f = frequency
λ = wavelength
Click here notes spectroscopy
3. ElectromagneticRadiationand Spectroscopy
Radiowaves
Nuclear spin
Nuclear MagneticResonance
Spectroscopy
• Organic structure determination
• MRI and body scanning
Infrared
Molecularvibration
InfraredSpectroscopy
UV or visible
Transitionof outervalenceelectron
• Organic structure determination
• Functional gp determination
• Measure bond strength
• Measure degree unsaturationin fat
• Measure level of alcohol in breath
ElectromagneticRadiation
UV Spectroscopy Atomic A Spectroscopy
• Quantification of metal ions
• Detection of metal in various samples
ElectromagneticRadiation Interact with Matter (Atoms, Molecules)= Spectroscopy
4. Diatomic molecule of same element DON’T absorb IR
• Symmetricaldiatomic bond will not absorb IR
• No change in dipole moment as molecule vibrate
• No absorption of IR
No change in dipole moment
MolecularVibration
Polar molecule will absorb IR
• H-CI, as bond stretches, distance bet atoms
increases, results in change in dipole moment
• Absorb IR
Condition formolecularvibration to absorba photon /IR
• Vibration causeoscillation in developinga change in dipole
bet oppositecharged centres
• Vibration of bond in HCI causedipole in bond to oscillate
• Cause a change in dipole moment
Oscillationof bonds
- lead to oscillation of dipole - change in dipole moment
IR absorb - Molecular Vibration – dipole moment change
Change in dipole moment
IR freq = Natural freq for bond – Resonance will happen.
• HCI bond has natural vibrational freq
• IR freq match the vibrational freq in HCI, IR is absorb and molecule excited to vibrational state
• IR absorb by bond will result in greater vibration in amplitude
Diatomic Molecules
Vs
IR frequency
is applied
IR frequency = Natural frequency for bond
↓
IR absorbed and resonance will happen
Dipole change
+
-
5. Diff bondabsorb IR radiation at frequency/wavenumber.
IR spectra organic compound with diff functional gps
IR Absorption by diff bonds/functional gps
IR Absorption diff functional gps and fingerprint region
Bond Wavenumber/cm-1
C –CI (Halogenoalkanes) 700-800
C – O (alcohol, ether, ester) 1000 - 1300
C = C (alkene) 1610 - 1680
C = O ( carbonyl) 1680 – 1750
C ≡ C (alkynes) 2070 - 2250
O –H (H bond in COOH) 2500 - 3300
C – H (alkane, alkene) 2840 - 3095
O – H (H bond in alcohol) 3230 - 3550
N – H (amines) 3350 - 3500
C – H stretch
(2840 – 3000)
C – O stretch
(1000-1300)
C = O stretch
(1680 -1740)
O – H stretch
(3230 -3550) C = C stretch
(1610-1680)
Fingerprinting region
• Range (1500- 400cm-1
)
• Specific to each molecule
Click here khan organic videos.
Click here khan IR videos.
6. IR spectra organic compound with diff functional gps
IR Absorption by diff bonds/functional gps
Bond Wavenumber/cm-1
C –CI (Halogenoalkanes) 700-800
C – O (alcohol, ether, ester) 1000 - 1300
C = C (alkene) 1610 - 1680
C = O ( carbonyl) 1680 – 1750
C ≡ C (alkynes) 2070 - 2250
O –H (H bond in COOH) 2500 - 3300
C – H (alkane, alkene) 2840 - 3095
O – H (H bond in alcohol) 3230 - 3550
N – H (amines) 3350 - 3500
Fingerprinting region
• Range (1500- 400cm-1
)
• Specific to each molecule
Transmittance/%Absorbance
Absorption/Transmittanceplotted twoways.
Transmittance Y-axis / wavenumber X-axis.
Absorption on Y-axis / wavenumber on X-axis.
Trans, % (T) and Absorbance (A)
Trans 100%mean IR Absorbance 0%
Trans 0% mean IR Absorbance 100%
wavenumber/cm-1
Transmittance
100%
Absorbance 0%
Transmittance 0%
Absorbance 100%
Infra Red Spectroscopy
• Wavenumber α frequency
• Wavenumber = Reciprocalof wavelength(1/λ) , Unit = cm-1
• Wavenumber= 1/Wavelength = numberwave cycles in one cm
IR wavelength from (2500 – 25000)nm → Convert to wavenumber(400 – 4000) cm-1
λ = 2500 nm (convert to cm) → λ = 0.00025 cm → Wavenumber= 1/λ = 1/0.00025 = 4000 cm-1
λ = 25000 nm (convert to cm) → λ = 0.0025 cm → Wavenumber= 1/λ = 1/0.0025 = 400 cm-1
λ low ↓ → Wavenumber, 1/λ is High ↑ → f = c x 1/λ → f is High ↑ → Energy = hf High ↑
wavenumber
bet 400 – 4000cm-1
Higher Wavenumber ↑ = Lower wavelength ↓= Higher ↑ frequency = GreaterEnergy↑
Click here khan wavenumber.
Click here khan organic videos.
7. Strength of bond
Single, Double, Triple Bond
Mass of atom
Lighter/Lower Mass atom
• Higher energy frequency for vibration
Stretching Vs Bending
Vibration
IR absorption
frequency
Heavier/Higher Mass atom
• Lower energy/frequency for vibration
Bending Vibration
• Less energy need for resonance
• Lower frequency/wavenumber
Stretching Vibration
• More energy need for resonance
• Higher frequency/wavenumber
Stronger bond
• Higher energy need for resonance
• Higher frequency/wavenumber
Weaker bond
• Lower energy need for resonance
• Lower frequency/wavenumber
IR absorptionfrequency
Strong bond
Weak bond
C- H = 2840cm-1
C- CI = 600cm-1
C- H stretch = 2840cm-1
C- H bend = 1400cm-1
Bond Bond enthalpy Wavenumber
C –C 348 800-1200
C = C 612 1610-1680
C ≡ C 837 2070-2250
Stretching Vibration
Bending Vibration
8. Molecule to absorb IR
• Vibrationwithin molecule cause a net change in dipole moment
• Frequency of radiation matchesvibrational naturalfrequency of molecule, radiation
will be absorbed, causing a change in amplitude of molecularvibration.
• A permanent dipole not necessary, only a change in dipole moment
• Not all bond absorb IR . For IR absorption, bond must have an electric dipole (bond polarity)
that changes as it vibrates.
• Molecules absorb IR – cause changes in modes of vibration (stretching/bending)
InfraredSpectroscopyand MolecularVibration
MolecularVibration
StretchingMode BendingMode
Symmetric Stretching
• change in bond length
• bond become shorter/longer
• IR ACTIVE (change in dipole)
• IR INACTIVE (No change in dipole)
Asymmetric Stretching
• change in bond length
• bond become shorter/longer
• IR ACTIVE (change in dipole)
• IR INACTIVE (No change in dipole)
Symmetric Bending
• change in bond angle
• bond angle bigger/smaller
• IR ACTIVE (change in dipole)
• IR INACTIVE (No change in dipole)
Asymmetric Bending
• change in bond angle
• bond angle bigger/smaller
• IR ACTIVE (change in dipole)
• IR INACTIVE (No change in dipole)
wagging twisting rocking scissoring
9. Molecular Vibration
Stretching Mode Bending Mode
Symmetric Stretching
- change in bond length
- bond become short/long
- Change dipole moment
- Absorb IR (active) at 3652
Asymmetric Stretching
- change in bond length
- bond become short/long
- change dipole moment
- Absorb IR (active) at 3756
Symmetric Bending
- change in bond angle
- Angle bigger/smaller
- change dipole moment
- Absorb IR (active) at 1595
Molecular Vibrationfor H2O(IR Spectrum)
IR spectrum for H2O
Molecular Vibrationfor SO2 (IR Spectrum)
Molecular Vibration
Stretching Mode
Symmetric Stretching
- change in bond length
- bond become short/long
- Change dipole moment
- Absorb IR (active) at 1150
Asymmetric Stretching
- change in bond length
- bond become short/long
- change dipole moment
- Absorb IR (active) at 1360
IR spectrum for SO2
Click here Spectra database (Ohio State) Click here Spectra database (NIST)
10. Molecular Vibration
Stretching Mode Bending Mode
Symmetric Stretching
- Bond polarity cancel out
- bond become short/long
- NO Change dipole moment
- IR (inactive)
Asymmetric Stretching
- change in bond length
- bond become short/long
- change dipole moment
- Absorb IR (active) at 2349
Symmetric Bending
- change in bond angle
- Angle bigger/smaller
- change dipole moment
- Absorb IR (active) at 667
Molecular Vibrationfor CO2 (IR Spectrum)
IR spectrum for CO2
Molecular Vibrationfor SO2 (IR Spectrum)
Molecular Vibration
Stretching Mode
Symmetric Stretching
- change in bond length
- bond become short/long
- Change dipole moment
- Absorb IR (active) at 1150
Asymmetric Stretching
- change in bond length
- bond become short/long
- change dipole moment
- Absorb IR (active) at 1360
IR spectrum for SO2
Click here Spectra database (Ohio State) Click here Spectra database (NIST)
11. Propanal (CH3CH2CHO)
• (2840-3000)→ C-H stretch
• (2720) → C-H stretch CHO
• (1680-1740) → C=O stretch
Hex-1-ene CH2=CH(CH2)3CH3
• (2840-3000) → C-H stretch
• (1610-1680) → C = C stretch
• (1200- 1400) → C-H bend
Hex-1-yne CH2≡CH(CH2)3CH3
• (3350) → C ≡ C stretch
• (2840-3000)→ C-H stretch
• (1200- 1400) → C-H bend
IR spectra organic compoundwith diff functional gps
Chloromethane CH3CI
• (2840-3000)→ C-H stretch
• (1200-1400)→ C-H bend
• (700-800) → C-CI stretch
Halogenoalkane Aldehyde
Alkene Alkyne
C – H stretch
(2840 – 3000)
C – H bend
(1200)
C – CI stretch
(700-800)
C – H stretch CHO
(2720)
C = O stretch
(1680 – 1740)
C – H stretch
(2840 – 3000)
C = C stretch
(1610-1680) C – C bend C ≡ C stretch
(3350)
C – H stretch
(2840 – 3000)
C – H bend
(1200)
CH3CI
CH3CH2CHO
CH2=CH(CH2)3CH3
CH2≡CH(CH2)3CH3
C – H stretch
(2840 – 3000)
12. Methanol (CH3OH)
• (3230-3550) → O-H stretch
• (2840-3000) → C-H stretch
• (1000-1300) → C-O stretch
Ethanol(CH3CH2OH)
• (3230-3550) → O-H stretch
• (2840-3000) → C-H stretch
• (1000-1300) → C-O stretch
Phenol (C6H5OH)
• (3230-3550) → O-H stretch
• (2840-3000) → C-H stretch
• (1400-1500) → C=C aromatic stretch
• (1000-1300) → C-O stretch
Benzoic acid (C6H5COOH)
• (3230-3550) → O-H stretch
• (2840-3000) → C-H stretch
• (1400-1500) → C=C aromatic stretch
• (1000-1300) → C-O stretch
• (1680-1740) → C=O stretch
IR spectra organic compoundwith diff functional gps
C – O stretch
(1000-1300)
C – H stretch
(2840 – 3000)
O – H stretch
(3230 -3550)
Broad Absorption due to
H bonding bet molecules
Broad Absorption due to
H bonding bet molecules
CH3OH
CH3CH2OH
C – O stretch
(1000-1300)
O – H stretch
(3230 -3550)
C – H stretch
(2840 – 3000)
O – H stretch
(3230 -3550)
C – H stretch
(2840 – 3000)
C – O stretch
(1000-1300)C = O stretch
(1680 – 1740)
C = C stretch
(1610-1680)
Broad Absorption due to
H bonding bet molecules
O – H stretch
(3230 -3550)
C – H stretch
(2840 – 3000)
C = C stretch
(1610-1680)
C – O stretch
(1000-1300)
Broad Absorption due to
H bonding bet molecules
13. Spectra diff bet Acid and Ester
Ethyl ethanoate(CH3COOCH2CH3)
• (2840-3000)→ C-H stretch
• (1680-1740) → C=O stretch
• (1000-1300) → C-O stretch
Methanoic acid (HCOOH)
• (3230-3550) → O-H stretch
• (2840-3000) → C-H stretch
• (1000-1300) → C-O stretch
• (1680-1740) → C=O stretch
Methanoic acid (HCOOH)
• (3230-3550) → O-H stretch
• (2840-3000) → C-H stretch
• (1000-1300) → C-O stretch
• (1680-1740) → C=O stretch
Methanoic acid
Methanoic acid
Spectra diff bet Acid and Alcohol
Methanol (CH3OH)
• (3230-3550) → O-H stretch
• (2840-3000) → C-H stretch
• (1000-1300) → C-O stretch
Ethyl Ethanoate
Methanol
Vs
Vs
O – H stretch
(3230 -3550)
C – H stretch
(2840 – 3000)
C – O stretch
(1000-1300)
C = O stretch
(1680 -1740)
C – H stretch
(2840 – 3000)
C = O stretch
(1680 - 1740) C – O stretch
(1000 - 1300)
O – H stretch
(3230 - 3550)
C – H stretch
(2840 – 3000)
C = O stretch
(1680 - 1740)
C – O stretch
(1000 - 1300)
CH3OH
O – H stretch
(3230 -3550)
C – H stretch
(2840 – 3000)
C – O stretch
(1000-1300)
14. Propan -2-ol CH3CH(OH)CH3 Propanone CH3COCH3
Hexan-1-ol CH3(CH2)4CH2OH Hexan-2-one CH3CO(CH2)3CH3
C - H
↓
← C-H bend
C-H bend →
Vs
Vs
Spectra diff bet Alcohol and Ketone
OH
↓
C - H
↓
← C=O
← C-H bend
↑
C - H
← C-H bend
Spectra diff bet Alcohol and Ketone
15. ← C-H stretch
← C-H stretch
← C-H stretch
← C-H stretch
← C=O stretch C=O stretch →
O-H
↓
O-H
↓
← C-H bend
← C-H bend
C-H bend →
C-H bend →
C=C stretch →
Finger printing
region
Finger printing
region
Finger printing
region
Finger printing
region
Propanal (Aldehyde) Butan-2-one (Ketone)
Butanol (Alcohol) But-2-en-1-ol( Alcohol + Alkene)
IR spectra organic compound with diff functional gps
C – H stretch CHO
(2720)
H
׀
CH3-CH2-C=O
O
‖
CH3CH2-C-CH3
CH3-CH=CH-CH2-OHCH3-CH2-CH2-CH2OH
16. Operating Principle Double Beam Infrared Spectrometer
Double beam splitter
• Direct half radiation through sample and otherhalf through reference
• Allow radiation passing through sample and compare it with reference
• Two beamsrecombinedat detector.
• Signal from sample/reference are compared to determine if sample
absorbradiation emittedfrom source
Reference
• Solvent to dissolve sample
• Reference use to eliminate instrument fluctuation,
absorption due to impurities in solvent and all interferences.
• IR Absorption due to solute using the reference
Monochromator
• Allow radiation of particularwavelength to pass through
Fouriertransformation
• Allow several wavelength through the sample at the same time and analyse the results
• Using mathematicaltechniques to determinethe amplitude/intensityof each single frequency
• Fouriertransformation-Intensityof IR radiation at each frequencydeterminedseparately
Recorder/Output
•Scanningwavenumber from 400 to 4000cm-1
• Spectrum of Abs/Trans vs frequency/wavenumber produced
Light Source
• Provide IR radiation