Determination of four triazole pesticides residues in aquatic products by gas chromatography spectrometry

A Gas Chromatography Spectrometry method (GC) for determination of 4 kinds of triazole pesticides residues including triazolone,triadimenol,cyproconazole and bitertanol in aquatic products was established in this study.The triazole pesticides were extracted with acetonitrile,then purified by graphitizing carbon-florisil column and eluted with acetone-n-hexane (1:9,V/V).Then the prepared samples were analyzed by gas chromatography spectrometry and quantified through external standard method.Results showed that the response value of triazolone has good linear relationship with mass concentration in the range of 1.25~125.00 ng/mL,and that of the other three pesticides were 25~2500 ng/mL.The correlation coefficients were all in the range of 0.999 7~0.999 8.When triazolone was spiked within 0.4~8.0 μg/kg and the others were spiked within 8~160 μg/kg,the average recoveries of intraday and interday of eel,Penaeus japonicus,abalone and asparagus were 78.8%~95.0%,and their relative standard deviations were 1.48%~11.4%.The limits of detection and quantitation of triadimenol、cyproconazole and bitertanol were 4.0 μg/kg and 8.0 μg/kg respectively,and that of triazolone was 0.2 μg/kg and 0.4 μg/kg respectively.These results suggested that the GC method established in this study could effectively detect the residues of 4 kinds of triazole pesticides in aquatic products.