Optimization of GC-MS/MS Determination of Residual Amounts of 16 Organochlorine Pesticides in Pine Needle with Accelerated Solvent Extraction Based on Design-Expert

GC-MS/MS was applied to the determination of residual amounts of 16 organochlorine pesticides in pine needle with accelerated solvent extraction.Extraction conditions of accelerated solvent extraction were optimized.The DB-5MS quartz capillary chromatographic column was used for GC separation and the total ion current monitoring mode were adopted in MS determination.Linear relationships between values of peak area and mass concentration of the 16 organochlorine pesticides were kept in definite ranges.Detection limits (3S/N) found were ranged from 0.3 to 2.8 μg·L-1.The proposed method was applied to the analysis of samples of pine needle,giving values of recovery and RSD′s (n=7) in the ranges of 80.9%-99.2% and 2.9%-8.4%,respectively.