"Electrochemical reduction of chloridazon at mercury electrodes, and its analytical application" . . "679104" . . "Z(MSM 153100013)" . "8"^^ . . "chloridazone; electrochemical reduction; analytical application;"@en . . "Vesela, Jana" . "Electrochemical reduction of chloridazon at mercury electrodes, and its analytical application"@en . "3"^^ . . "0937-0633" . . "7" . "Electrochemical reduction of chloridazon at mercury electrodes, and its analytical application" . "0"^^ . "Skopalov\u00E1, Jana" . "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."@en . . . "RIV/61989592:15310/01:00001696!RIV/2003/MSM/153103/N" . "0"^^ . "Fresenius' Journal of Analytical Chemistry" . . "DE - Spolkov\u00E1 republika N\u011Bmecko" . . . "5"^^ . "975-982" . "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." . . "[C65E65032FBA]" . "Zimpl, Milan" . "371" . . . . . "Kotou\u010Dek, Milan" . "15310" . . "Electrochemical reduction of chloridazon at mercury electrodes, and its analytical application"@en . "RIV/61989592:15310/01:00001696" . "Lemr, Karel" .