Development of a specific electrochemical sensor for occupational and environmental monitoring of diazinon

بهداشت و ایمنی کار

Farnoush Faridbod¹  Monireh Khadem²  Abbas Foroushani Rahimi Foroushani³  Rasoul Yarahmadi⁴  Mohammad Reza Ganjali⁵  Parviz Norouzi⁵  Seyed Jamaleddin Shahtaheri⁶ 

[1] Assistant Professor, Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran;Assistant Professor, Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran;Associate Professor, Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran;Associate Professor, Department of Occupational Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran;Professor, Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran;Professor, Department of Occupational Health Engineering, School of Public Health, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran;

关键词: diazinon;    molecularly imprinted polymer;    sensor;    biological monitoring;   

DOI  :  

来源: DOAJ

【 摘 要 】

Diazinon is commonly used for pest control in the agricultural fields because of its relatively low cost and high efficiency. Due to the increasing application of pesticides, reliable and accurate analytical methods are necessary for their monitoring. This work was aimed to design the high selective electrochemical sensor for determining of diazinon in biological and environmental samples. The composition of sensor was modified with multi-walls carbon nanotubes and a molecularly imprinted polymer (MIP). A diazinon MIP was synthesized and applied in the carbon paste electrode (CP). The prepared sensor was used to determine the concentration of analyte. Parameters affecting the sensor response, such as sample pH, electrolyte concentration and its pH, and the instrumental parameters of square wave voltammetry, were optimized in different levels to select the optimum conditions for analysis of diazinon. The MIP-CP electrode showed very high specificity for determining the analyte. The obtained linear range was 1×10-6 to 5×10-10 mol L-1. The detection limit was 2.7×10-10 molL-1. This sensor was successfully used to determine the diazinon in environmental and biological real samples without special sample pretreatment before analysis.

【 授权许可】

Unknown