GC/MS外标法测定食品中18种有机磷农残的实验研究  

Dvelopment of a GC/MS method for ditiction 18 organo phosphoruspestides in foods

作　　者：李永香[1] 李发生[2] 刘江华[1] 米凤琴[1] 

机构地区：[1]郑州市疾病预防控制中心,河南郑州450053 [2]河南省疾病预防控制中心,郑州450003

出　　处：《河南预防医学杂志》2005年第2期73-75,共3页Henan Journal of Preventive Medicine

摘　　要：目的　研究建立食品中18种有机磷农残的GC/MS同时测定方法。方法　采用GC/MS通过标准试验确定全扫描和检测离子扫描的测定条件,通过样品及样品及样品试验验证改进的样品前处理过程。结果　在实际样品含量的测定范围内各目标化合物标准曲线相关系数在0.9902-1.0000之间;方法定量检出下限(S/N=10,n=5)在:6.61×10ˉ3mg/kg^4.78×10ˉ2mg/kg之间;加标样品重复性条件下测定两次,测定结果的绝对误差小于算术平均值的5.2%-13.5%,回收率在76.3%--89.7%之间。结论　可代替现有国标气相色谱法进行实际样品测定,结果证实定性定量准确性优于气相色谱法。In this paper,the 18 organo phisphorus pesticides risidues were determined altogxther by GC/MS.In thedeterminational range of sample ontents(0-5mg/kg),the correlation coefficient is 0.9936-0.9999;The quantitative detection limit (S/N=10,n=5)is 6.61X10 -3mg/kg^4.78X10 -2mg/kg by the full scan pattern methd; and The samples which concentration is 0.5mg/kg were determined twice reduplicatly,the absolute error of results is 5.2%-13.5%;and the mean recovery of the target compounds is 76.3%-89.7% in the different matrixs. The linearity?detection limit? internal recovery are good.It can instead of GC methed.

关 键 词：GC/MS 测定 食品残留 18种有机磷 

分 类 号：R15[医药卫生—营养与食品卫生学] R155.5[医药卫生—公共卫生与预防医学]