About the Author: MARVIN C. McMASTER, PhD, is a consultant and Adjunct Professor of Chemistry at the University of Missouri-St. Louis, where he teaches courses on HPLC, GC/MS, LC/MS, and laboratory computing. He is a former researcher and product developer for DuPont, Kraft Foods, and Ciba-Geigy, and previously worked as a technical sales support specialist for Waters, Beckman, and Pharmacia. In addition to this book, Dr. McMaster is the author of HPLC: A Practical User's Guide, Second Edition; GC/MS: A Practical User's Guide, Second Edition; and LC/MS: A Practical User's Guide, all from Wiley.