Determination of cyanide in microsamples by means of capillary flow injection analysis with amperometric detection.
A new approach for determining cyanide in microsamples is described. The method is based on capillary flow injection analysis (CFIA) with amperometric detection. The sensing electrode is a silver-plated microdisk electrode, where cyanide can react under formation of a dicyanoargentate complex. A remarkably low mass detection limit of 231 fmol cyanide is obtained for an injection volume of 60 nl. The sample throughput of the CFIA-arrangement is comparable with a conventional sized FIA-system. A practical application is given by analyzing the cyanide (amygdalin) concentration in apple kernels.
Backofen
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Department of Chemistry, University of Leipziz, Linnéstrasse 3, D-04103, Leipzig, Germany.
Matysik
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FM
Werner
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