David S. Bell, PhD Manager, Analytical Research and Services Sigma-Aldrich/Supelco With a B.S. degree from SUNY Plattsburgh and a Ph.D. in Analytical Chemistry from The Pennsylvania State University, Dave spent the first decade of his career within the pharmaceutical industry performing analytical method development using various forms of chromatography and electrophoresis. During the past 15 years, working directly in the chromatography industry, Dave has focused his efforts on the design, development and application of stationary phases for use in HPLC and hyphenated techniques. In his current role of Manager, Pharmaceutical and Bioanalytical Research at Supelco, Dr. Bell’s main focus has been to research, publish and present on the topic of molecular interactions that contribute to retention and selectivity in an array of chromatographic processes.