R. Graham Cooks, PhD, is Henry Bohn Hass Distinguished Professor of Chemistry at Purdue University and Director of the Center for Instrumentation Development. His interests involve construction of mass spectrometers and their use in fundamental studies and applications. Early in his career he contributed to the concept and implementation of tandem mass spectrometry and to desorption ionization, especially matrix-based methods. His work on ionization methods has led to the ambient method of desorption electrospray ionization. Applications of this method include tissue imaging for cancer margin detection in surgery, forensics and pharmaceutical development. His interests in the fundamentals of ion chemistry include chirality effects and atmospheric pressure reactivity. Dr. Cooks is a past President of the American Society for Mass Spectrometry and is on the boards of a number of scientific journals.