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DETERMINATION OF INORGANIC AND ORGANOTIN COMPOUNDS IN SEA WATER BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY (JOURNAL VERSION)
Citation:
Chamasz, M. AND J. Winefordner. DETERMINATION OF INORGANIC AND ORGANOTIN COMPOUNDS IN SEA WATER BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY (JOURNAL VERSION). U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-88/226.
Description:
Inorganic tin and organotin compounds in artificial sea water were determined at sub-p.p.b. levels. These compounds are separated from matrix elements in aqueous solutions by benzene extraction of their iodide forms from a 2M sulphuric acid-1.5M sodium iodide solution containing 1 percent m/V ascorbic acid. The organic phase was partially vaporized to pre-concentrate the analytes and was injected directly into the treated graphite tube; the signal was measured by a Zeeman atomic absorption spectrometer. Using a matrix modifier, inorganic tin could be directly determined at sub-p.p.m. levels in the presence of organotin compounds.