André M. Striegel, PhD, is Assistant Professor in the Department of Chemistry & Biochemistry at the Florida State University, with previous industrial R&D experience at Solutia. He has published and lectured extensively in the area of polymer chromatography and is the recipient of several national awards in analytical chemistry. WALLACE W. YAU, PhD, received his doctorate in physical chemistry from University of Massachusetts and is currently a scientist specialist at Dow Chemical Co., with past industrial experience at DuPont and Chevron. He has been in GPC research and polymer characterization for the past four decades. JOSEPH J. KIRKLAND, PhD, is author or coauthor of eight widely read books on liquid chromatography, more than 150 peer-reviewed papers, and thirty patents. With over fifty years of industrial experience, he has been the recipient of many major national and international awards in analytical chemistry. DONALD D. BLY, PhD, retired as manager of analytical science, central research, DuPont. He has remained working as a consultant to analytical and analytical-polymer science businesses and has remained active in the American Chemical Society and ASTM.