Determination of Four Pesticide Residues in Chinese-cabbage by GC-MS
The analyzing method that synchronously determining four pesticide residues (including Pyrimethani,Fipronil, Pyridaben and Difenoconazole) in Chinese-cabbage hy means of GC-MS was developed. The pesticide residues in Chinese-cahbage were extracted by high-speed homogenate with acetonitrile, purified by Carbon/NH2 solid phase extraction column (SPE), and quantitatively analyzed by ion scan. The results showed that when additive concentration was 0.20 mg/kg, the peak area and mass concentration of the four pesticide residues showed a great linear relationship,the fortified recovery of the four pesticide residues was 100.55%. 95.05%. 93.80% and 92.75%, respectively; the detection limit of the four pesticide residues was 0.01, 0.02. 0.01 and 0.05 mg/kg, respectively. This method obtained a great linear relationship and better recovery, meanwhile it also ensured a hetter accuracy.
NETL
NSTL
万方数据
维普
