Ion Mobility Spectrometry chronicles the developments of ion mobility spectrometry (IMS) from its inception two decades ago to applications and plans for the future. Fundamental aspects of atmospheric pressure chemical ionization processes and their effect on the response characteristics of IMS are analyzed. The theory and physics governing the motion of ions drifting through an atmospheric pressure buffer gas in an electric field are presented in a simplified yet comprehensive manner. The book also presents a report on recent developments and applications in IMS instrumentation, including laboratory instruments, monitoring systems, and hand-held instrumentation. The performance of GC/IMS is analyzed and critically evaluated, and tables of reliable reduced mobility values are provided. Analytical chemists, mass spectrometrists, physical chemists, chromatographers and others interested in the subject will find this book to be a comprehensive survey and a valuable reference.