用乙腈萃取火腿试样中的残留农药,所得萃取液经凝胶渗透色谱柱净化后用气相色谱法(带火焰光度法检测器)测定了9种农药的残留量,用外标法定量.HP-1701型毛细管色谱柱(30 m×0.53 mm,1.0 μm)用于气相色谱分离,采用柱温250 ℃和检测器温度230 ℃,载气为氮气,流速为10 mL·min-1,测得三唑膦农药的测定限为2.8 μg·kg-1,其它8种有机膦农药的测定限均为5 μg·kg-1.用标准加入法测定回收率,9种农药的回收率均在70%以上.

Ham sample was extracted with acetonitrile,and the organophosphorus pesticides in the extract were purified by passing through the gel permeable column (GPC).Elution was carried out with cyclohexane-ethyl acetate (1+1) mixture as eluant,and the eluate collected from the 100th-165th mL was taken for GC determination of 9 pesticides.Flame photometric detection (FPD) and external standard method were adopted in the quantitative analysis.DB-1701 capillary chromatographic column (30 m×0.53 mm,i.d.1.0 μm) was used in the GC-separation,with the column temperature at 250 ℃,and the detector temperature at 230 ℃.Flow-rate of the carrying gas (N2) taken was 10 mL·min-1.Limit of quantification of triazophos was found to be 2.8 μg·kg-1,while for the other 8 pesticides,the values found were all 5 μg·kg-1.Recovery test of all these pesticides were done and results obtained were above 70%.