Study on the Optimization of Chromatographic Parameters in Determination of Malathion in Cereal
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Abstract:
Using AC10 capillary column for GC analysis of malathion content in Cereal, the influence of peak height, peak area and retention time, oven temperature, carrier gas flow rate (column flow), detector temperature, injector temperature, purge flow and time for split vent, H2 flow and Air flow, make-up flow rate, were discussed and optimized. The detection limit of the method was 0.005 mg/kg and the recoveries of malathion and coefficient variation ranged from 78.54% to 92.03% and from 1.52% to 5.32%, respectively. Results showed that the sensitivity, accuracy and precision of the method were suitable for the residue analysis of pesticide. It also proved that the detection limit of the method with the optimized chromatographic parameters were in accordance with the requirement for testing MRL of malathion according to the hygienic standard for grains completely.
