Voltammetric Determination of the Herbicide Linuron Using a Tricresyl Phosphate-Based Carbon Paste Electrode

Sensors

Jelena Đorᄞvić³  Zsigmond Papp⁴  Valéria Guzsvány⁴  Ivan Švancara¹  Tatjana Trtić-Petrović³  Milovan Purenović² 

[1] Department of Analytical Chemistry, University of Pardubice, Studentská 573, 53210 Pardubice, Czech Republic; E-Mails:;Department of Chemistry, Faculty of Sciences and Mathematics, University of Niš, P.O. Box 224, 18000 Niš, Serbia; E-Mail:;Laboratory of Physics, Vinča Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia; E-Mails:;Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg D. Obradovića 3, 21000 Novi Sad, Serbia; E-Mail:

关键词: Linuron;    herbicide;    carbon paste electrode;    tricresyl phosphate;    differential pulse voltammetry;   

DOI  :  10.3390/s120100148

来源: mdpi

【 摘 要 】

This paper summarises the results of voltammetric studies on the herbicide 3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea (Linuron), using a carbon paste electrode containing tricresyl phosphate (TCP-CPE) as liquid binder. The principal experimental conditions, such as the pH effect, investigated in Britton-Robinson buffer solutions (pH 2.0–7.0), the peak characteristics for the analyte of interest, or instrumental parameters for the differential pulse voltammetric mode were optimized for the method. As found out, the best electroanalytical performance of the TCP-CPE was achieved at pH 2.0, whereby the oxidation peak of Linuron appeared at ca. +1.3 V vs. SCE. The analytical procedure developed offers good linearity in the concentration range of 1.25–44.20 μg mL⁻¹ (1.77 × 10⁻⁴–5.05 × 10⁻⁶ mol L⁻¹), showing—for the first time—the applicability of the TCP-CPE for anodic oxidations in direct voltammetry (without accumulation). The method was then verified by determining Linuron in a spiked river water sample and a commercial formulation and the results obtained agreed well with those obtained by the reference HPLC/UV determination.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland