Presents an overview of applications, a critical evaluation of current techniques for sampling and for obtaining spectra, and an extensive guide to the literature, both spectra and papers. Covers everything from how to prepare almost any kind of sample and how to optimize the controls on an infrared spectrometer, to identifying and measuring pollutants at the parts per million level. Stresses all fundamental concepts and limitations, includes examples of difficulties and pitfalls throughout. Emphasizes development of technique and careful manipulation of samples and spectrometers. Highlights quantitative analysis with examples. Also reviews factors affecting group frequencies.