[目的]建立气相色谱内标法测定霜霉威原药的新方法。[方法]以邻苯二甲酸二甲酯为内标物、丙酮为溶剂,以配有FID检测器的气相色谱仪进行测定。[结果]线性相关系数为0.9992,平均回收率为98.32%,RSD为0.89%。[结论]该方法简便、快速、准确、可靠,适用于霜霉威的质量检验。 [Objective] To establish a new method for the determination of propamocarb by GC internal standard method. [Method] With dimethyl phthalate as internal standard and acetone as solvent, gas chromatography with FID detector was used for determination. [Result] The linear correlation coefficient was 0.9992, the average recovery rate was 98.32% and the RSD was 0.89%. [Conclusion] The method is simple, rapid, accurate and reliable and suitable for the quality control of propamocarb.