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[目的]在同柱同条件下,对丙.氰25%乳油中丙溴磷和氰戊菊酯2种组分的分离测定方法进行研究,为企业生产的质量控制及质检机构提供参考。[方法]以5%OV-101色谱柱固定相,邻苯二甲酸双环己酯为内标物,用FID检测器,利用程序升温方法对丙.氰25%乳油中2种组分进行气相色谱分离和测定。[结果]丙.氰25%乳油中2种组分及杂质得到了有效分离,丙溴磷、氰戊菊酯标准偏差分别为0.065、0.047;变异系数分别为0.52%、0.37%;回收率分别为99.06%～100.72%,99.25%～100.63%;线性相关系数分别为0.999 8、0.999 6。[结论]该方法测定丙.氰25%乳油2种有效成分的质量分数,具有分离效果好,准确度、精密度高,线性关系好,符合定量要求,是一种可行的分析方法。
[Objective] The research aimed to study the separation and determination of two components of profenofos and fenvalerate in 25% EC of cyproxanthin under the same column conditions, and provide a reference for the quality control and quality control of the enterprise. [Method] With 5% OV-101 column stationary phase and dicyclohexyl phthalate as internal standard, the two components of C 25% EC were analyzed by gas chromatography with FID detector Isolation and determination. [Result] The two components and impurities in cypermethrin 25% EC were effectively separated. The standard deviations of profenofos and fenvalerate were 0.065 and 0.047, respectively. The coefficients of variation were 0.52% and 0.37%, respectively. The recoveries were Were 99.06% ~ 100.72% and 99.25% ~ 100.63%, respectively. The linear correlation coefficients were 0.999 8 and 0.999 6, respectively. [Conclusion] The method was used to determine the mass fraction of two effective components of cyanoacrylate 25% EC. It has the advantages of good separation effect, high accuracy, high precision, good linearity and compliance with quantitative requirements. It is a feasible analytical method.