ROBERT L. GROB, PhD, is Professor Emeritus of Analytical Chemistry at Villanova University and a consultant in analytical and environmental chemistry. His previous books include Environmental Problem-Solving Using Gas and Liquid Chromatography (with Dr. Mary A. Kaiser of the DuPont Company), Chromatographic Analysis of the Environment, and three editions of this text. Dr. Grob is the recipient of the Stephen Dal Nogare Award in Chromatography, the EAS Award in Separation Science, and the Father Daniel Egan Award (from his undergraduate alma mater) for Excellence in Science and Teaching. Dr. Grob received his BS in Chemistry from the Franciscan University of Steubenville and his MS and PhD in Analytical Chemistry from the University of Virginia.

EUGENE F. BARRY, PhD, is Professor of Chemistry and Chair of the Chemistry Department at the University of Massachusetts, Lowell. Dr. Barry has lectured in numerous short courses on GC, HPLC, and Capillary Electrophoresis. Along with Dr. Grob, he is coinstructor of the popular short course "Practical Gas Chromatography: Packed and Capillary Columns," annually presented at the Eastern Analytical Symposium and the Pittsburgh Conference. He is author or coauthor of over 100 publications and has several patents. He received his BS in Chemistry from Villanova University and his PhD in Analytical Chemistry from the University of Rhode Island.