Voltammetric Determination of Selected Nitro Compounds at a Polished Silver Solid Amalgam Composite Electrode
Voltammetric behavior of selected biologically active organic nitro compounds, namely 2‐nitrofluorene, picric acid (2,4,6‐trinitrophenol) and metronidazole, has been investigated using direct current voltammetry (DCV) and differential pulse voltammetry (DPV) at a polished silver solid amalgam compos...
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Published in | Electroanalysis (New York, N.Y.) Vol. 23; no. 1; pp. 129 - 139 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
01.01.2011
WILEY‐VCH Verlag |
Subjects | |
Online Access | Get full text |
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Summary: | Voltammetric behavior of selected biologically active organic nitro compounds, namely 2‐nitrofluorene, picric acid (2,4,6‐trinitrophenol) and metronidazole, has been investigated using direct current voltammetry (DCV) and differential pulse voltammetry (DPV) at a polished silver solid amalgam composite electrode (p‐AgSA‐CE). The optimum conditions have been found for their determination in a 1 : 1 mixture of methanol and aqueous Britton–Robinson buffer of pH 5.0 for 2‐nitrofluorene and in the aqueous Britton–Robinson buffer solutions of pH 2.0 and 4.0 for picric acid and metronidazole, respectively, with the limits of quantification (LQs) 4, 0.1 and 2 µmol L−1 (DCV at p‐AgSA‐CE) and 3, 1 and 4 µmol L−1 (DPV at p‐AgSA‐CE) for 2‐nitrofluorene, picric acid and metronidazole, respectively. An attempt to increase the sensitivity using adsorptive stripping voltammetry was not successful for all three test substances. For comparison, the UV‐vis spectrophotometric determinations of studied compounds have also been carried out in methanol for 2‐nitrofluorene (LQ≈1 µmol L−1) and in deionized water for picric acid (LQ≈3 µmol L−1) and metronidazole (LQ≈2 µmol L−1). Practical applicability of the newly developed voltammetric methods was verified on direct determination of the studied compounds in drinking and river waters with LQs around 10−6 mol L−1 for all the studied compounds. |
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Bibliography: | Grant Agency of Charles University in Prague - No. Projects 89710/2010/B-Ch/PrF and SVV 261204 The Ministry of Education, Youth and Sports of the Czech Republic - No. Projects LC 06035, MSM 0021620857 and RP 14/63 ArticleID:ELAN201000428 Grant Agency of the Academy of Sciences of the Czech Republic - Project No. IAA400400806 istex:6AC5F9BDCCD2C2F59927893AAADC89D04E56D906 ark:/67375/WNG-3Q1ZKD3Z-N ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 1040-0397 1521-4109 1521-4109 |
DOI: | 10.1002/elan.201000428 |