LC/MS: A Practical User's Guide focuses on practical applications of LC/MS in compound identification and analysis of trace impurities. Like Dr. McMaster's previous books, it is designed as an easy-to-use reference for people working with LC/MS systems. The book discusses empirical methods for optimizing the method, maintaining the instrumentation, and using mass spectral library databases for compound identification. It includes a CD-ROM with PowerPoint slides and Frequently Asked Questions meant to facilitate the use of the book for learning and teaching purposes.