Determination of omethoate by cathodically sweeping oscillopolarography |
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Authors: | Wang Yu Sun Yuansi Huang Junhua Zhang Wuming Zhou Xingyao |
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Affiliation: | (1) College of Chemistry, Wuhan University, 430072 Wuhan, China |
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Abstract: | Determination of omethoate by cathodically sweeping oscillopolarography is described. The product of the alkaline hydrolysis exhibited a sensitive second derivative wave at −0.50 V (vs. SCE) in a 1.0 ×10−5mol/L sodium dodecylbenzene sulfonate (SDBS)+0.1 mol/L HAc-NaAc (pH 4.0) buffer. The peak current was linearly proportional to the concentration of omethoate in the range from 6.4×10−7 to 5.1×10−5 mol/L. The detection limit is 2.0×10−7 mol/L with the relative standard derivation (RSD) of 3.5%. The hydrolysis procedure and the electrode reaction were studied by voltammetry. Supported by the Foundation of Chinese-Franch Cooperation Programme on the Advanced Research Wang Yu: born in 1964. Lecturer. Cangzhou Teacher’s College, Cangzhou, Hebei, 061001 |
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Keywords: | omethoate alkaline hydrolysis oscillopolarography organophosphorous pesticide |
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