ELECTROCHEMICAL BEHAVIOUR OF NORFLURAZON AT MERCURY ELECTRODES, AND ITS ANALYTICAL APPLICATION
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F07%3A00005777" target="_blank" >RIV/61989592:15310/07:00005777 - isvavai.cz</a>
Result on the web
—
DOI - Digital Object Identifier
—
Alternative languages
Result language
angličtina
Original language name
ELECTROCHEMICAL BEHAVIOUR OF NORFLURAZON AT MERCURY ELECTRODES, AND ITS ANALYTICAL APPLICATION
Original language description
Norflurazon (systemic herbicide, Fig. 1) is reducible at mercury electrodes to the different extent depending on media acidity, area of mercury cathode and its contact time with an electrode surface. The electrode reaction, investigated using direct current and pulse voltammetry, controlled-potential coulometry, and HPLC-MS, is a combination of the electro-reduction and a kinetic process. Four-electron (by voltammetry) or six- electron (by coulometry) irreversible reduction of a norflurazon protonized form was observed in strongly acid media. Simple compounds (HCl, NH3) are released and five- membered pyrrole cycle is formed at electroconversion in these types of media. Only two-electron reduction proceeds in weakly acid solutions and no signal is observed in neutral pH values. A new diffusion wave strongly affected by kinetics is formed in alkaline media. Norflurazon was determined in 0.01 M HCl using differential pulse voltammetry and adsorptive stripping voltammetry with limits of d
Czech name
Elektrochemické chování a analytické aplikace nurflurazonu na rtuťových elektrodách
Czech description
Norflurazon je různě redukovatelný na rtuťových elektrodách v závislosti na kyselosti média, ploše rtuťové katody a době kontaktu s povrchem elektrody. Byla studována elektrodová reakce s využitím stejnosměrné a pulsní voltametrie, potenciostatické coulometrie, HPLC-MS a bylo zjištěno, že jde o elektroredukci a kinetický proces. 4-eletronová (voltametricy) nebo 6-elektronová (coulometricy) nevratná redukce protonizované formy nurflurazonu byla pozorována v silně kyselém prostředí. Nurflurazon byl stanoven v 0,01 M HCl pomocí diferenční pulsní voltametrie a adsorpční stripping voltametrie s detekčními limity 43 nmol/L a 18 nmol/L.
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CB - Analytical chemistry, separation
OECD FORD branch
—
Result continuities
Project
—
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach
Others
Publication year
2007
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Acta Universitatis Palackianae Olomucensis, Facultas Rerum Naturalium, Chemica
ISSN
0232-0061
e-ISSN
—
Volume of the periodical
47
Issue of the periodical within the volume
1
Country of publishing house
CZ - CZECH REPUBLIC
Number of pages
11
Pages from-to
—
UT code for WoS article
—
EID of the result in the Scopus database
—