蔬菜中毒死蜱残留量FPD检测的基质效应

通过对不同标准溶液配制方式建立校正曲线外标法定量的回收率比较,丙酮基质溶剂配制的毒死蜱标准溶液校正曲线回收率为92%~99%,相对标准偏差(RSD)≤4.18%,毒死蜱在0.035～1.4 mg/L范围内有很好的线性关系,该方法的仪器检出限为0.02 mg/L,方法检出限为0.008 mg/kg.对同一样品采用双火焰光...

Chlorpyrifos Residues in Vegetables Detection of Matrix Effects FPD

The standard solutions prepared by different methods to establish the amount of external standard calibration curve recovery com- pared to the preparation of acetone solvent matrix calibration curve standard solution of chlorpyrifos recovery is 92% to 99% ,relative standard deviation （RSD） ≤4.18% ,chlorpyrifos in the 0. 035 - 1.4 mg/L in the range a good linear relationship between the instrument detection limit of this method is 0.02 mg/L, the detection limit is 0. 008 mg/kg. On the same sample by double flame photometric detector （FPD） detection, DB - 1701 ＋ DG than the DB - 1 column matrix effects a small column. Standard solution prepared by the solvent matrix to establish the amount of external standard calibration curve to eliminate matrix effects.