Electrochemical reduction of chloridazon at mercury electrodes, and its analytical application

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F01%3A00001696" target="_blank" >RIV/61989592:15310/01:00001696 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Electrochemical reduction of chloridazon at mercury electrodes, and its analytical application

Original language description

The electrochemical behavior of the herbicide chloridazon, I (pyrazon), at different pH is described. The electrode reaction (one wave in acidic media and another in alkaline media), investigated using direct current and pulse voltammetry, controlled-potential coulometry, and HPLC-MS, is a combination of the electroreduction (two-electron in the first step) and a kinetic process as a result of which simple compounds (HCl, NH3) are released and, moreover, a five-membered pyrrole cycle is formed in strongly acid media. Products of the kinetic reaction are further reducible. The dissociation constant of I, pK(a) = 2.96, was found spectrophotometrically. Fast-scan differential pulse voltammetry (FSDPV) was used for determination of I; the detection limit was 2.7x10(-8) mol L-1 (0.006 mug L-1) at pH 2.3. Chloridazon was determined in spiked drinking and river water.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CB - Analytical chemistry, separation

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2001

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Fresenius' Journal of Analytical Chemistry

ISSN

0937-0633

e-ISSN

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Volume of the periodical

371

Issue of the periodical within the volume

7

Country of publishing house

DE - GERMANY

Number of pages

8

Pages from-to

975-982

UT code for WoS article

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EID of the result in the Scopus database

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