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Statements

Subject Item
n2:RIV%2F61989592%3A15310%2F01%3A00001696%21RIV%2F2003%2FMSM%2F153103%2FN
rdf:type
n12:Vysledek skos:Concept
dcterms: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. 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.
dcterms:title
Electrochemical reduction of chloridazon at mercury electrodes, and its analytical application Electrochemical reduction of chloridazon at mercury electrodes, and its analytical application
skos:prefLabel
Electrochemical reduction of chloridazon at mercury electrodes, and its analytical application Electrochemical reduction of chloridazon at mercury electrodes, and its analytical application
skos:notation
RIV/61989592:15310/01:00001696!RIV/2003/MSM/153103/N
n4:strany
975-982
n4:aktivita
n16:Z
n4:aktivity
Z(MSM 153100013)
n4:cisloPeriodika
7
n4:dodaniDat
n13:2003
n4:domaciTvurceVysledku
n5:2670003 n5:7092970 n5:4316851
n4:druhVysledku
n6:J
n4:duvernostUdaju
n15:S
n4:entitaPredkladatele
n17:predkladatel
n4:idSjednocenehoVysledku
679104
n4:idVysledku
RIV/61989592:15310/01:00001696
n4:jazykVysledku
n8:eng
n4:klicovaSlova
chloridazone; electrochemical reduction; analytical application;
n4:klicoveSlovo
n11:chloridazone n11:electrochemical%20reduction n11:analytical%20application
n4:kodStatuVydavatele
DE - Spolková republika Německo
n4:kontrolniKodProRIV
[C65E65032FBA]
n4:nazevZdroje
Fresenius' Journal of Analytical Chemistry
n4:obor
n9:CB
n4:pocetDomacichTvurcuVysledku
3
n4:pocetTvurcuVysledku
5
n4:pocetUcastnikuAkce
0
n4:pocetZahranicnichUcastnikuAkce
0
n4:rokUplatneniVysledku
n13:2001
n4:svazekPeriodika
371
n4:tvurceVysledku
Vesela, Jana Skopalová, Jana Zimpl, Milan Kotouček, Milan Lemr, Karel
n4:zamer
n14:MSM%20153100013
s:issn
0937-0633
s:numberOfPages
8
n18:organizacniJednotka
15310