Modern Raman Spectroscopy
A Practical Approach
Chapter One
Introduction, Basic Theory and
Principles
1.1 INTRODUCTION
The main spectroscopies employed to detect vibrations in molecules are based
on the processes of infrared absorption and Raman scattering. They are widely
used to provide information on chemical structures and physical forms, to
identify substances from the characteristic spectral patterns ('fingerprinting'),
and to determine quantitatively or semi-quantitatively the amount of a substance
in a sample. Samples can be examined in a whole range of physical
states; for example, as solids, liquids or vapours, in hot or cold states, in bulk,
as microscopic particles, or as surface layers. The techniques are very wide
ranging and provide solutions to a host of interesting and challenging analytical
problems. Raman scattering is less widely used than infrared absorption,
largely due to problems with sample degradation and fluorescence. However,
recent advances in instrument technology have simplified the equipment and
reduced the problems substantially. These advances, toget ... read full excerpt from Modern Raman Spectroscopy: A Practical Approach ebook
