Study on the method of residue analysis of picoxystrobin in banana and soil
To study the method of residue analysis of picoxystrobin in banana and soil.The samples were extracted with acetonitrile,purified by solid phase extraction,detected by gas chromatography-microelectronic capture detector,and external standard for quantification.The recoveries of banana and soil were 101.4％～109.2％and 93.7％～105.0％,respectively,in the range of 0.02 to 0.10 mg/kg and 0.01 to 0.10 mg/kg,relative standard deviation(RSD)were 2.5％～4.0％and 2.8％～8.4％,respectively.The minimum detected amounts were 0.01 ng,and the minimum detected concentrations were 0.02 mg/kg and 0.01 mg/kg,respectively.The sensitivity,accuracy and precision of the method meet the requirements of pesticide residue analysis,and can be widely used for the detection of picoxystrobin residue.
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