Application of international standards in the determination of pesticide residues in Szechwan Lovage Rhizome
According to FDA and EU regulations on pesticides,residue limits,and method validation requirements,a detection method for 54 pesticide residues in Szechwan Lovage Rhizome was established using a modified QuEChERS method combined with LC-MS/MS.The samples were soaked with acetic acid aqueous solution 1％,extracted by acetonitrile,purified by QuEChERS,detected by LC-MS/MS,and procedural standard calibration method was used for quantification.The results showed that the linear relationships of 54 pesticides were good,and the correlation coefficients(R2)were over 0.99.At the three spiked levels of 0.01,0.05 and 0.1 mg/kg,the average recoveries were 92.5％-105.5％,intra-day RSD(n=5)were 0.4％-6.6％and inter-day RSD(n=10)were 1.0％-1 1.7％.The method was simple,fast,accurate,and suitable for high-throughput detection of pesticide residues in Szechwan Lovage Rhizome.
international standardQuEChERSLC-MS/MSSzechwan Lovage Rhizomepesticide residuedetermination
万方数据
维普
