Thomas Roy Crompton, PhD was head of the Analytical Research Laboratory of the Polymer research laboratory, Shell Chemicals UK for 30 years. He was then head of Water Analysis Laboratories in the U.K. for 15 years. Dr. Crompton has published extensively, and his areas of expertise include analysis of natural and sea waters, soils, sediments and sludge, preconcentration techniques in water analysis application of chromatography, and mass spectrometry to water analysis.