Interdigitated Array Diffusion Layer Titration of Dithiocarbamates with Electrogenerated Hypobromite

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Title:Interdigitated Array Diffusion Layer Titration of Dithiocarbamates with Electrogenerated Hypobromite
Creators:
Tomčík, Peter
Bustin, Dušan
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 65, 6, pp. 1029-1034
Uncontrolled Keywords:Electrogeneration, Pesticides, Dithiocarbamates, Electrochemistry, Interdigitated array microelectrode, Diffusion layer titration

Abstract

A simple but sensitive technique was developed for determination of dithiocarbamates. The proposed method is based on its oxidation with hypobromite under the formation of sulfate. The oxidation proceeds only in the close vicinity of interdigitated array microelectrode (IDA), the segments of which were used as working and indicator electrodes. Hypobromite was formed by disproportionation of galvanostatically generated bromine (from bromide) in weakly alkaline solution on one segment of IDA (generator). The unreacted flux of hypobromite was amperometrically detected on the second segment (collector-indicator). The hypobromite flux is influenced by dithiocarbamates present in solution, causing changes in the collector <i>versus</i> generator current plot (titration curve) which can be quantitatively evaluated. The sensitivity of the method is 7 795 l mol<sup>-1</sup> μA and detection limit estimated according to the 3s criterion is 2.2 · 10<sup>-6</sup> mol l<sup>-1</sup>. The technique was used in analysis of real samples, such as in determination of a pesticide residues in cucumber leaves. <p>

Title:Interdigitated Array Diffusion Layer Titration of Dithiocarbamates with Electrogenerated Hypobromite
Creators:
Tomčík, Peter
Bustin, Dušan
Uncontrolled Keywords:Electrogeneration, Pesticides, Dithiocarbamates, Electrochemistry, Interdigitated array microelectrode, Diffusion layer titration
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:65
Number:6
Page Range:pp. 1029-1034
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20001029UNSPECIFIED
ID Code:1696
Item Type:Article
Deposited On:06 Feb 2009 17:11
Last Modified:06 Feb 2009 16:11

Citation

Tomčík, Peter; Bustin, Dušan (2000) Interdigitated Array Diffusion Layer Titration of Dithiocarbamates with Electrogenerated Hypobromite. Collection of Czechoslovak Chemical Communications, 65 (6). pp. 1029-1034. ISSN 0010-0765

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