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Research here spans a wide range of topics from analytical chemistry to materials science, and from biological chemistry to theoretical chemistry. The specific work in chemical biology and medicinal chemistry, as an example, encompasses pioneering techniques in synthesis, bioinformatics, nucleic acid chemistry, amino acid chemistry, heterocyclic chemistry, biophysical chemistry and NMR spectroscopy.

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Effect of sample preparation on the operational speciation of cadmium and lead in a freshwater sediment

Davidson, C M and Wilson, Lorna E. and Ure, Allan M . (1999) Effect of sample preparation on the operational speciation of cadmium and lead in a freshwater sediment. Fresenius' Journal of Analytical Chemistry, 363 (1). pp. 134-136. ISSN 0937-0633

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Abstract

The three-stage sequential extraction procedure recommended by BCR has been applied in the operational speciation of cadmium and lead in a relatively unpolluted freshwater sediment, following various types of sample pre-treatment. Changes in speciation occurred when the sediment was air-dried, oven-dried or frozen. Cadmium speciation was particularly perturbed by freezing, whilst lead was more affected by oven-drying. Metals were deter mined by electrothermal atomic absorption spectrometry, using direct calibration with reagent-matched standard solutions.