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YANG SUNKAI,ZANG SHULIANG. 1986. DETERMINATION OF RESIDUAL MALATHION IN NATURAL WATER. Acta Oceanologica Sinica, (4):530－536
DETERMINATION OF RESIDUAL MALATHION IN NATURAL WATER
DETERMINATION OF RESIDUAL MALATHION IN NATURAL WATER
Received:January 24, 1985  Revised:January 05, 1986
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Author NameAffiliation
YANG SUNKAI Department of Chemistry, Xiamen University, Xiamen 
ZANG SHULIANG Department of Chemistry, Xiamen University, Xiamen 
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Abstract:
      A method for determination of malathion in natural water by cathodic stripping voltammetry using mercury film electrode is suggested in this paper. The method is based on the quantitative formation of {(CH3O)2-P〈SS}- group generated by malathion as a result of elimination reaction in the ethanol solution of sodium hydroxide. The group is similar to sulphide in electrochemical properties, and can be determined by cathodic stripping voltammetry. Interference from inorganic sulphide is prevented by the addition of Hg(NO3)2. This method has been applied to the determination of residual malathion in natural water (e. g. the sea, rivers, lakes, etc.). The waveheight is directly proportional to the malathion concentration within the range 5×10-9-1×10-7 mol/L. The method is simple and rapid, and the results of water sample determination is quite in accord with those of Gas Chromatograph.
中文摘要:
      A method for determination of malathion in natural water by cathodic stripping voltammetry using mercury film electrode is suggested in this paper. The method is based on the quantitative formation of {(CH3O)2-P〈SS}- group generated by malathion as a result of elimination reaction in the ethanol solution of sodium hydroxide. The group is similar to sulphide in electrochemical properties, and can be determined by cathodic stripping voltammetry. Interference from inorganic sulphide is prevented by the addition of Hg(NO3)2. This method has been applied to the determination of residual malathion in natural water (e. g. the sea, rivers, lakes, etc.). The waveheight is directly proportional to the malathion concentration within the range 5×10-9-1×10-7 mol/L. The method is simple and rapid, and the results of water sample determination is quite in accord with those of Gas Chromatograph.
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