【作者】 黄诚； 郭梅；

【Author】 Huang Cheng,Guo Mei (Zhongshan Center for Disease Control and Prevention,Guangdong Zhongshan 528403,China)

【机构】 中山市疾病预防控制中心； 中山大学公共卫生学院；

【摘要】 目的优选QuEChERS方法中黄瓜拟除虫菊脂类农药残留净化剂的最佳组合。方法采用正交实验法,以农药加标回收率(气相色谱法)为指标,考察净化剂PSA(N-丙基乙二胺)、C18(C18烷基-硅胶)、GCB(石墨化炭黑)三因素的影响。结果重复试验表明,10g黄瓜2ml定容液净化剂的最佳组合是A2B1C2,即0.075gPSA,0.025gC18,0.050gGCB.结论正交试验法用于优选蔬菜中农药残留检测的QuEChERS净化剂组合,既可节省试剂,又能满足检测需要。更多还原

【Abstract】 Objective To optimize cleanup of pyrethroid pesticide residues in cucumber for QuEChERS.Methods The study was carried out through orthogonal experimental design,using GC recovery as the guide.Three factors of PSA(A),C18(B) and GCB(C) were studied.Results The optimized conditions for cleanup were A2B1C2,namely 0.075g PSA,0.025g C18 and 0.050g GCB for 10 g cucumber.Conclusion Orthogonal test for the best conditions of cleanup by QuEChERS can not only cut down expenses but also meet the requirement of the pesticide residues detection.更多还原