DENNIS JENKE is Principal Scientist in the Technology Resources Division of the Baxter Healthcare Corporation. He works with a team of analytical chemistry professionals in areas including the assessment of material/product compatibility, specifically with respect to leachables/extractables and product ingredient binding. He has published extensively in the areas of analytical chemistry, environmental science, and material/solution compatibility; serves as an expert reviewer for numerous pharmaceutical and analytical journals; is a frequently invited speaker in the general areas of analytical chemistry and material/solution compatibility; and is currently an active participant in ongoing collaborative activities designed to establish harmonized best demonstrated practices for extractables/leachables assessment.