Square wave voltammetric determination of methyl parathion using ZrO2-nanoparticles modified carbon paste electrode

Journal of Hazardous Materials
H Parham, N Rahbar

Abstract

A carbon paste electrode is modified with ZrO(2)-nanoparticles and its application for square wave voltammetric (SWV) detection of methyl parathion, MP (organophosphate pesticide) is reported. The nano-ZrO(2) shows a strong affinity toward the phosphate group on methyl parathion molecules, which provides sensitivity and selectivity of the modified carbon paste electrode. Instrumental and chemical parameters influencing the voltammetric response are optimized for MP determination. Under optimum experimental conditions the peak current is linear to MP concentration over the range of 5.0-3000.0 ng mL(-1) with a correlation coefficient of 0.9992. The limit of detection (LOD) and limit of quantification (LOQ) for MP based on three and ten times the standard deviation of the blank (3S(b), 10S(b)) were 2.0 and 5.7 ng mL(-1) (n=20) for MP, respectively. The recovery values from quality control (QC) samples of water solutions containing low, middle and high concentrations of MP (50, 100 and 800 ng mL(-1)) were 98.0+/-2.3%, 92.5+/-4.9% and 97.6+/-2.8%, respectively. The electrode is successfully applied for the determination of MP in different water samples.

Citations

Jun 24, 2014·Journal of Hazardous Materials·Zhong-Gang LiuXing-Jiu Huang
Mar 21, 2015·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Neuma das Mercês PereiraRita de Cássia Silva Luz
Apr 14, 2015·Jundishapur Journal of Natural Pharmaceutical Products·Nadereh RahbarAhmad Babapour
Feb 3, 2011·Applied Biochemistry and Biotechnology·Kanchanmala DeshpandeSunil Bhand
Jun 13, 2014·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·LiPing HuPinGang He
Mar 14, 2014·Jundishapur Journal of Natural Pharmaceutical Products·Nadereh Rahbar, Hooshang Parham
Dec 16, 2020·Analytical Methods : Advancing Methods and Applications·Priscila A R de SousaRodrigo A B da Silva
Aug 10, 2021·ACS Sensors·Zachary T JohnsonJonathan C Claussen

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