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Statements

Subject Item
n2:RIV%2F61989592%3A15310%2F07%3A00005777%21RIV10-MSM-15310___
rdf:type
skos:Concept n18:Vysledek
dcterms:description
Norflurazon (systemic herbicide) 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 detection 43 nmol.L-1 (13 Norflurazon (systemic herbicide) 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 detection 43 nmol.L-1 (13
dcterms:title
Electrochemical behaviour of Norflurazon at mercury electrodes, and its analytical applications Electrochemical behaviour of Norflurazon at mercury electrodes, and its analytical applications
skos:prefLabel
Electrochemical behaviour of Norflurazon at mercury electrodes, and its analytical applications Electrochemical behaviour of Norflurazon at mercury electrodes, and its analytical applications
skos:notation
RIV/61989592:15310/07:00005777!RIV10-MSM-15310___
n3:aktivita
n10:Z n10:S
n3:aktivity
S, Z(MSM6198959216)
n3:cisloPeriodika
1
n3:dodaniDat
n14:2010
n3:domaciTvurceVysledku
n12:4316851 n12:2670003 n12:7092970
n3:druhVysledku
n17:J
n3:duvernostUdaju
n8:S
n3:entitaPredkladatele
n15:predkladatel
n3:idSjednocenehoVysledku
419695
n3:idVysledku
RIV/61989592:15310/07:00005777
n3:jazykVysledku
n16:eng
n3:klicovaSlova
herbicide; norflurazon; mercury electrodes; coulometry; voltammetry
n3:klicoveSlovo
n5:voltammetry n5:norflurazon n5:coulometry n5:mercury%20electrodes n5:herbicide
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[3880CF0F0ACC]
n3:nazevZdroje
Acta Universitatis Palackianae Olomucensis, Facultas Rerum Naturalium, Chemica
n3:obor
n9:CB
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
4
n3:rokUplatneniVysledku
n14:2007
n3:svazekPeriodika
47
n3:tvurceVysledku
Lemr, Karel Kotouček, Milan Zimpl, Milan Skopalová, Jana
n3:zamer
n11:MSM6198959216
s:issn
0232-0061
s:numberOfPages
11
n13:organizacniJednotka
15310