毛细管气相色谱同时测定水产品中多种农药残留量

建立了固相萃取-气相色谱法快速检测水产品中11种农药残留的分析方法。样品用乙腈水溶液均质提取,经盐析作用分离出乙腈层,经C18和PSA串联柱净化后用GC-FPD检测分析,采用外标法定量。方法的检出限(S/N=3)为0.004～0.008mg/kg,在加标水平为0.01mg/kg时,方法回收率为71.2%～107%,相对标准偏差为3.9%～9.5%;在加标水平为0.02mg/kg时,方法回收率为73.5%～108%,相对标准偏差为3.5%～10%。

Determination of multi pesticides residue in fishery product by capillary gas chromatography

A method for the rapid determination of 11 pesticide multiresiduals in fishery product by gas chromatography with solid-phase extraction was proposed.The compounds were extracted from ho-mogenized tissue with acetonitrile-water.After acetonitrile was separated by salting-out,acetonitrile purified by solid phase extraction was ready for GC-FPD analysis.Under the optimal conditions,the detection limits（S/N=3）were in the range of 0.004～0.008mg/kg.Tests for recovery were made by addition of mixed standards of 0.01mg/kg,and the recoveries were 71.2%～107%,and the relative standard deviations were 3.9%～9.5%.Tests for recovery were made by addition of mixed standards of 0.02mg/kg,and the recoveries were 73.5%～108%,and the relative standard deviations were 3.5%～10%.