Voltammetric determination of the herbicide Bifenox in drinking and river water using a silver solid amalgam electrode

0358328 - ÚFCH JH 2012 RIV DE eng J - Journal Article
Barek, J. - Cabalková, D. - Fischer, J. - Navrátil, Tomáš - Pecková, K. - Josypčuk, Bohdan
Voltammetric determination of the herbicide Bifenox in drinking and river water using a silver solid amalgam electrode.
Environmental Chemistry Letters. Roč. 9, č. 1 (2011), s. 83-86. ISSN 1610-3653. E-ISSN 1610-3661
R&D Projects: GA ČR GA203/07/1195
Institutional research plan: CEZ:AV0Z40400503
Keywords : differential pulse voltammetry * silver solid amalgam electrode * solid phase extraction
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 1.881, year: 2011

A new method for the determination of submicromolar and nanomolar concentrations of herbicide Bifenox using differential pulse voltammetry at a mercury meniscus modified silver solid amalgam electrode is described. This new type of working electrode is non-toxic, environmentally friendly, and compatible with principles of green analytical chemistry, and its surface can be easily electrochemically renewed in the case of passivation. The newly developed direct differential pulse voltammetric determination of Bifenox gives limit of determination 6.7 center dot 10(-7) and 6.9 center dot 10(-7) M in drinking and river water, respectively. Both the selectivity and the sensitivity can be further increased by preliminary separation and preconcentration using solid phase extraction. This combination enables to reach limit of determination 0.9 x 10(-9) and 1.5 x 10(-9) M for drinking and river water, respectively.
Permanent Link: http://hdl.handle.net/11104/0196409