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Determination of three different polar organophosphorus pesticides in juice drinks by GC-FPD

KE Hua;ZHENG Shen-xi;CHEN Ke-xing;Lin Jie;Fuzhou Center for Disease Control and Prevention;  
Objective To establish a new GC- FPD method for simultaneous determination of 3 commonly used organophosphorus pesticides( methamidophos,malathion,fenitrothion) in juice drinks. Methods 3 organophosphorus pesticides were oscillated abstracted by acetonitrile( ratio of juice in 3: 1),and then determinated by GC- FPD with external standard method. Results The average recovery of standard addition were 88. 0- 100. 0%,the relative standard deviations were 2. 29- 3. 78%,the detection limit were 0. 02 mg / kg,the standard curve have good linearity relative within 0. 05-1. 0 mg / L. Conclusion This method is simple,rapid. It has a good linear relationship and a higher degree of accuracy and precision.
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