Determination of Two Organophosphorus Pesticides Using Electrochemical Sensor in Water Samples

Fu Qiang Fan; Jun Feng Dou; Li Rong Cheng; Ai Zhong Ding; Lin Jiang; Jue Jun Yao; Yong Chao Du; Yi Hui Liu; Dan Zhang

doi:10.4028/www.scientific.net/AMR.239-242.368

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 239-242Determination of Two Organophosphorus Pesticides...

Determination of Two Organophosphorus Pesticides Using Electrochemical Sensor in Water Samples

Abstract:

A detection method for organophosphorus pesticides using electrochemical sensor based on enzyme inhibition has been developed. Acetylcholine esterase (AChE) was selected to quantify the pesticides concentration in water samples due to its activity was non-competitively inhibited in the presence of pesticides. To detect parathion and dichlorvos, optimized analytical conditions were that the substrate concentration was 3mmol/L, enzyme solution concentration was 18g/L and reaction time was 20min. Under the optimized detection conditons, a detection limit of 1.2ng/mL and 0.004ng/mL for parathion and dichlorvos was obtained, respectively. The approach was rapid, simple, accurate and of high sensitivity when compared with immunoassays or chromatographic methods.

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Periodical:

Advanced Materials Research (Volumes 239-242)

Pages:

368-371

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.239-242.368

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Online since:

May 2011

Authors:

Fu Qiang Fan, Jun Feng Dou, Li Rong Cheng, Ai Zhong Ding, Lin Jiang, Jue Jun Yao, Yong Chao Du, Yi Hui Liu, Dan Zhang

Keywords:

AChE, Dichlorvos, Electrochemical Sensor, Organophosphorus Pesticides, Parathion

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