Determination of thiram in water and soils by cathodic stripping voltammetry based on adsorptive accumulation

Summary A very sensitive electrochemical stripping procedure for thiram is reported. Accumulation is achieved by adsorption of the compound on the hanging mercury drop electrode. Optimal experimental parameters include an accumulation potential of –0.2 V vs. Ag/AgCl, a 0.075 mol/l ammonia solution as supporting electrolyte and a differential pulse stripping mode. The detection limit is 0.3 ng ml^–1 after 120 s accumulation and 0.03 ng ml^–1 after 600 s accumulation. Results are reported for water and soil samples.

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Bestimmung von Thiram in Wasser und Böden mit Hilfe der Cathodic-Stripping Voltammetrie aufgrund adsorptiver Anreicherung