THE FUNCTION OF FTIR IN MODERN ANALYSIS OF CHEMICAL COMPOUNDS

TABLE OF CONTENT

CONTENTS                                                                         PAGE

Title Page    –        –        –        –        –        –        –        –        i

Certification         –        –        –        –        –        –        –        ii

Dedication –        –        –        –        –        –        –        –        iii

Acknowledgements        –        –        –        –        –        –        iv

Table of Contents –        –        –        –        –        –        –        vi

CHAPTER ONE

1.            INTRODUCTION       –        –        –        –        –        1

CHAPTER TWO

2.0     DEVELOPMENTAL BACKGROUND OF FTIR     4

2.1     Components of FTIR     –        –        –        –        –        6

2.1.1  IR Sources  –        –        –        –        –        –        –        7

2.1.2  Detectors    –        –        –        –        –        –        –        8

2.1.3  Beam Splitter       –        –        –        –        –        –        9

2.2     Spectral Range     –        –        –        –        –        –        10

2.3     Michelson Interferometer        –        –        –        –        –        12

2.4     Measuring and Processing the Interferogram       –        –        14

CHAPTER THREE

3.0     RESOLUTION OF FTIR      –        –        –        –        19

3.1     Application of FTIR      –        –        –        –        –        20

3.1.1  Nano and Biological Materials          –        –        –        –        21

3.1.2  Microscopy and Imaging         –        –        –        –        –        21

3.1.3  Nanoscale and Spectroscopy below the diffraction limit         22

3.1.4  FTIR as detector in chromatography          –        –        –        23

3.1.5  Water content determination in plastics and composites        23

3.1.6  TG-IR (Thermogravimetric Analysis – Infrared

Spectrometry)      –        –        –        –        –        –        24

CHAPTER FOUR

• CONCLUSION AND RECOMMENDATION-         –        25
  •           Conclusion –        –        –        –        –        –        –        25
  •           Recommendations         –        –        –        –        –        –        26

References

CHAPTER ONE

1.0       INTRODUCTION

Fourier-Transform Infrared Spectroscopy (FTIR) is a technique used to obtain an infraredspectrum of absorption or emission of a solid, liquid or gas. An FTIR collects high-resolution spectral data over a wide spectral range. This confers a significant advantage over a dispersive spectrometer, which measures intensity over a narrowrange of wavelengths at a time.The term Fourier-transform infrared spectroscopy originates from the fact that a Fouriertransform (a mathematical process) is required to convert the raw data into the actual spectrum.

The goal of absorption spectroscopy techniques (FTIR, ultraviolet-visible (“UV-Vis”)spectroscopy, etc.) is to measure how much light a sample absorbs at each wavelength. The most straight forward way to do this, the “dispersive spectroscopy” technique, is tohttp://shine amonochromatic light beam at a sample, measure how much of the light is absorbed, and repeatfor each different wavelength. (This is how some UV–vis spectrometers work, for example.)

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