A gas chromatographic method was developed to separate and quantify the active ingredients in the formulation product fenazaquin 18%SC with HP-1 capillary column and FID using didecyl phthalate as internal standard.The results showed that the retention time and separation efficiency of fenazaquin were well with the new method.The linear correlation coefficients(R2)between the mass concentrations of fenazaquin and their responding values were 0.9997,the standard deviations were 0.1174%,the coefficients of variation were 0.64%,and the average recoveries were 99.81%,respectively.The results indicating that the method has good precision and accuracy,and it is suitable for the detection of fenazaquin.
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