Simultaneous differential pulse-polarographic determination of CS2 and COS gases and its application in the analysis of dithiocarbamate fungicide residues in foods |
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Authors: | Wolfgang Schwack, Bernd Brü ger Steven Nyanzi |
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Affiliation: | (1) Institut für Lebensmittelchemie der Universität Karlsruhe, Kaiserstrasse 12, D-76128 Karlsruhe, Germany |
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Abstract: | The differential pulse-polarographic (DPP) determination of both CS2 and COS gases, after their absorption in a methanolic piperidine reagent and the subsequent application of this technique to the residue analysis of dithiocarbamate fungicides is described. Rectilinear calibration curves for both CS2 and COS in the respective regions of 1.5–9.2 and 2.1–12.6 mol/l were obtained. The DPP method has been successfully applied to the determination of thiram residues on apples after a hot acid hydrolysis of the fruits. |
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