Total Extractable Tin Measurement in Complex Matrices. An Evaluation.
Final rept. Feb-Aug 85,
NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA
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Direct measurement by GFAASGraphite Furnace Atomic Absorption Spectrophotometry of organic extracts for extractable tin results in a concentration value highly dependent upon both sample composition and the standard use for the calibration. Measurement of these extracts after washing with NaOH and using Bu3SnCl as a standard, however, results in a reliable measurement of Bu3Sn in the extract. Gas chromatography after derivatization of the butyltins with pentyl magnesium bromide and flame AAS after the formation of hydride derivatives were also used to measure concentrations of butyltins in organic extracts. Provided the sample for hydride derivatization is highly diluted to prevent organics interference, good correlation between the two methods is obtained for all butyltins and for Bu3Sn measured by GFAAS after the NaOH wash. Author
- Physical Chemistry