Study of Five Organochlorine Pesticide Residues in Xiuzhen Mushroom by Gas Chromatography
A method for the determination of pentachloronitrobenzene,dicofol,bifenthrin,permethrin and fenvalerate in Xiuzhen mushroom was established by optimizing the oscillating time,extraction time and nitrogen blowing time of pretreatment.The results showed that the optimal extraction conditions were oscillation time of 2 min,extraction time of 20.5 min and nitrogen blowing time of 28.5 min.The detection limits of the above five organochlorine pesticides were 0.016 μg/kg,0.029 μg/kg,0.056 μg/kg,0.017 μg/kg and 0.081 μg/kg,respectively.The experimental results showed that the average recoveries of the five pesticides were 76.3%～106.2%,and the RSD values were 1.7%～9.7%,all of which met the detection requirements of gas chromatography,and the unknown samples of Xiuzhen mushroom were capable of detecting the above five pesticides.The experiment shows that the method has high sensitivity,high recovery and precision,low cost and easy operation,and can be used for the detection of 5 kinds of pesticide residues.
gas chromatographyXiuzhen mushroompesticide residue
NETL
NSTL
万方数据
