摘要
建立了烟草中40种农药残留的气相色谱-质谱检测方法。样品用乙腈提取后过TPT固相萃取小柱进行净化,在气质联用仪上采用选择离子检测(SIM)模式进行测定。该方法在0.05～1μg/mL范围内线性关系良好,基质混合标准曲线相关系数在0.993～0.999之间,各农残组分回收率均在74.7%～113.1%之间,RSD在0.6%～9.4%之间。各农药组分的检测限(LOD)在0.006～0.027μg/g之间,定量限(LOQ)在0.018～0.045μg/g之间。该方法的灵敏度、准确性和精密度均符合农残检测技术的要求。
An analytical method was developed for the simultaneous determination of 40 pesticides in tobacco using GC/MS. Tobacco samples were extracted with acetonitrile, cleaned by solid-phase extraction（SPE） , and then were determined by GC/MS using selected ion monitoring （SIM）mode. Good linearity was obtained in the range of 0.05 - 1 μg/mL, with correlation coefficients of 0. 993 to 0. 999. All the pesticides had mean recoveries of 74. 7% - 113.1% with stable values among the lower, middle and higher concentrations. The limits of detection （LOD） were in the range of 0. 006 -0. 027 μg/g, while the limits of quantitation （LOQ） were in the range of 0. 018 -0. 045 μg/g. The sensitivity, accuracy and precision of the method met the requirements for the analysis of multiple pesticide residues in tobacco.
出处
《分析试验室》
CAS
CSCD
北大核心
2012年第11期24-29,共6页
Chinese Journal of Analysis Laboratory
基金
公益性行业(农业)科研专项(201203091)资助
