GC/MS: A Practical User's Guide, Second Edition teaches readers the practical applications of gas chromatography-mass spectrometry in compound identification and analysis of trace impurities. The book discusses empirical methods for optimizing chromatography, maintaining the instrumentation, and using mass spectral libraries for compound identification. This Second Edition includes information on recent advances in miniaturized and field-portable GC/MS systems and the use of microfluidic components.