Simultaneous Determination of 30 Pesticide Residues in Soil by GC-MS

A GC-MS method was developed for the determination of 30 pesticide residues in soil.The sample was extracted with acetonen-hexane (1+1) and hexane in succession.Then the extract was cleaned up on a florisil cartridge and separated on a HP-5MS column.EI-SIM was adopted in MS and external standard was used for quantification.The linearity range of 30 pesticide residues was 0.1-1.0 mg·L-1 with detection limits (3S/N) in the range of 3.8-9.6 μg·kg-1.The recovery rates measured by standard addition method were in the range of 75.8%-103% and RSD (n=6) were in the range of 5.6%-9.7%.