Determination of 8 Pyrethroid Pesticide Residues in Nuts by Gas Chromatography
  
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KeyWord:gas chromatography(GC)  pyrethroid pesticide  Hawaii nuts  pigeon nuts  almonds
  
AuthorInstitution
LIAO He-jing,HU Li-yuan,LIU Rui-fang,LIANG Dong-jun 广西东兴出入境检验检疫局
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Abstract:
      An analytical method was developed for the determination of 8 pyrethroid pesticide residues in nuts(hawaii nuts,pigeon nuts,almonds imported from ASEAN).The samples were extracted with acetonitrile by ultrasonic technique,purified with Alumina-N SPE and Florisil SPE.The components were separated with two different polarity capillary columns,and 8 kinds of pyrethroid pesticide residues were detected by GC with ECD detector.The linear range of the method was in the range of 0.01-1.0 μg/mL(r=0.999 2-0.999 9).The recoveries at three spiked concentrations of 10,20,50 μg/kg were in the range of 71%-115%,with relative standard deviations(RSD) of 4.5%-9.8%.The limits of detection(LOD,S/N=3) were in the range of 0.014-0.28 μg/kg.The limits of quantitation(LOQ,S/N=10) were in the range of 0.047-0.94 μg/kg.The established method has the advantages of good separation,high accurancy,high recovery, convenience and rapidness,and could be used for the routine analysis of pesticide residues in nuts.
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