Determination of 26 Pesticide Residues in Sporoderm-broken Spores of Ganoderma lingzhi by QuEChERS-gas chromatography Method
A QuEChERS-gas chromatography method with high sensitivity and good accuracy was developed for the determina-tion of 26 pesticide residues in sporoderm-broken spores of Ganoderma lingzhi.The samples were soaked in acetic acid solu-tion,extracted by acetonitrile acetate,purified by QuEChERS,separated by HP-5 column,detected by electron capture detector(ECD)and flame photometric detector(FPD),and quantized by external standard method.The results showed that the linear correlation coefficients of 26 target pesticides were greater than 0.99 between 0.005-1.000 mg·L-1,the detection limits were 0.001 2-0.006 9 mg·kg-1,the limits of quantitation were 0.004 0-0.023 2 mg·kg-1,The recoveries were 69.4%-120.3%,the precision was 0.9%-6.2%,with three concentrations of pesticides standard solution 0.030 mg·kg-1,0.060 mg·kg-1 and 0.300 mg·kg-1 added.With advantages of rapid,accurate,sensitive and reproducible,the method was suitable for the determination of pesticide residues in sporoderm-broken spores of G.lingzhi.
sporoderm-broken spores of Ganoderma lingzhigas chromatographyQuEChERSpesticide residues
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NSTL
万方数据
