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Evidence supporting the presence of dissolved dimethylarsinate in the marine environment

โœ Scribed by A. G. Howard; L. E. Hunt; C. Salou

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
75 KB
Volume
13
Category
Article
ISSN
0268-2605

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โœฆ Synopsis

Experiments have been carried out to test the commonly held belief that the dissolved dimethylarsenic species present in marine waters is dimethylarsinate. By employing a novel combination of HPLC and cryogenic-trap hydride generation atomic absorption spectroscopy (HG AA), the sensitivity limitations of conventional in-line HPLC instrumentation can be overcome, permitting dimethylarsinate to be measured by HPLC at levels below 200 pg cm ร€3 . A comparison of results obtained by this procedure with those obtained by direct cryogenic-trap HG AA demonstrated that much of the dissolved dimethylarsenic present in the mouth of the Beaulieu River estuary (Hampshire, UK) had HPLC retention characteristics consistent with the presence of dimethylarsinate.

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