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Determination of arsenic in sea water by cathodic stripping voltammetry in the presence of pyrrolidine dithiocarbamate

✍ Scribed by Jiri Zima; Constant M.G van den Berg

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
568 KB
Volume
289
Category
Article
ISSN
0003-2670

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✦ Synopsis

A procedure is presented for the determination of arsenite and total arsenic in sea water using differential pulse cathodic stripping voitammetry at a hanging mercury drop electrode in the presence of pyrrolidine dithiocarbamate (PDC). The deposition potential was -0.3 V, whereas the scan was initiated from 0 V. Optimised conditions include a PDC concentration of 0.5/zM and a pH = 0.8. The detection limit of the method is 3 nM As. The method was tested by analysis of CASS-2 certified sea water and applied to determination of arsenic in Atlantic ocean water.

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