Využití visící rtuťové kapkové elektrody modifikované oktan-1-thiolem ve voltametrické analýze genotoxických environmentálních polutantů

Translated title of the contribution: The use of a hanging mercury drop electrode modified with octane-1-thiol in voltammetric analysis of genotoxic environmental pollutants

Vít Prchal, Vlastimil Vyskočil, Aleš Daňhel, Jiří Barek, Joseph Wang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Voltammetric behavior of some genotoxic nitro derivatives of aromatic hydrocarbons (nitrobenzene, 1-nitronaphthalene, 2-nitrofluorene, and 9-nitroanthracene) and nitrophenols (2- and 4-nitrophenol) has been studied with the aim to improve the selectivity of their simultaneous voltammetric determination at a hanging mercury drop electrode (HMDE) modified with octane-1-thiol. Optimum conditions were investigated in Britton-Robinson (BR) buffer - methanol (1:1) at pH 2.0 - 12.0. At an unmodified HMDE, only the 4-nitrophenol/1-nitronaphthalene and 4-nitrophenol/2-nitrofluorene pairs could be simultaneously determined in neutral and alkaline media due to the peak potential differences higher than 300 mV. After modification of HMDE with 1·10 -4 and 1·10 -6 mol l -1 octane-1-thiol, the peak potentials of most analytes (in BR buffer of pH 2.0 - methanol 1:1) were shifted to more negative values and their peak heights decreased. Only in the case of nitromethane, the modification of HMDE with 1·10 -6 mol l -1 octane-1-thiol led to a positive potential shift and to an increased voltammetric response, caused probably by its accumulation in the octane-1-thiol monolayer. However, the differences in the peak potentials of the analytes at unmodified and modified HMDE were not sufficient for their simultaneous determination. Further improvement and optimization of the determinations of environmental pollutants are investigated.

Original languageCzech
Pages (from-to)217-224
Number of pages8
JournalChemicke Listy
Volume105
Issue number3
Publication statusPublished - 1 Mar 2011
Externally publishedYes

Fingerprint

Environmental Pollutants
Mercury
Sulfhydryl Compounds
Electrodes
Methanol
Buffers
Aromatic Hydrocarbons
Monolayers
octane
Derivatives
4-nitrophenol

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Využití visící rtuťové kapkové elektrody modifikované oktan-1-thiolem ve voltametrické analýze genotoxických environmentálních polutantů. / Prchal, Vít; Vyskočil, Vlastimil; Daňhel, Aleš; Barek, Jiří; Wang, Joseph.

In: Chemicke Listy, Vol. 105, No. 3, 01.03.2011, p. 217-224.

Research output: Contribution to journalArticle

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