Voltammetric Determination of Carcinogenic Nitrobiphenyls at a Hanging Mercury Drop ElectrodeReportar como inadecuado




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1

UNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Charles University, 128 43 Prague 2, Czech Republic

2

Center for Ecology, Toxicology and Analysis, Research Institute for Organic Syntheses, 532 18 Pardubice-Rybitví, Czech Republic





*

Author to whom correspondence should be addressed.



Abstract Differential pulse voltammetry DPV and adsorptive stripping voltammetry AdSV at a hanging mercury drop electrode HMDE was used for the determination of trace amounts of carcinogenic nitrobiphenyls, namely 2-nitrobiphenyl 2-NBP, 3-nitrobiphenyl 3-NBP and 4-nitrobiphenyl 4-NBP within the concentration range from 2.10-8 to 1.10-5 mol⋅L-1 for DPV and from 2.10-9 to 1.10-7 mol⋅L-1 for AdSV using a Britton-Robinson buffer – methanol 1:1 mixture with resulting pH 12 as a base electrolyte. The practical applicability of newly developed methods was verified using model samples of drinking and river water and liquid-liquid extraction for a preliminary separation and preconcentration.

Keywords: Hanging mercury drop electrode; Differential pulse voltammetry; Adsorptive stripping voltammetry; 2-nitrobiphenyl; 3-nitrobiphenyl; 4-nitrobiphenyl Hanging mercury drop electrode; Differential pulse voltammetry; Adsorptive stripping voltammetry; 2-nitrobiphenyl; 3-nitrobiphenyl; 4-nitrobiphenyl





Autor: Radek Štěpán 1, Jiří Barek 1,* , Viktor Mejstřík 2 and Jiří Zima 1

Fuente: http://mdpi.com/



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