偏二甲肼纯度分析方法的改进

Improved Analytical Method for Determining the Purity of Unsymmetrical Dimethylhydrazine

摘要: 采用毛细管气相色谱内标法代替标准工作曲线法测定偏二甲肼纯度(UDMH),内标法的使用避免了微量进样不准确的缺陷.结果显示,该方法线性范围宽,偏二甲肼的标准曲线相关系数为0.9959,样品加标回收率98.39%,样品的测定标准偏差为0.0015,方法的准确度高、重现性好.

Abstract: Capillary gas chromatographic internal standard method was used to determine the purity of unsymmetrical dimethylhydrine(UDMH) instead of the standard working curve method.Weakness of trace impouring imprecisely was avoided by using internal standard method.The results showed that the method has broad linear scope and the correlation coefficient for UDMH is 0.9959.The average recovery for the sample is 98.39% and standard deviation is 0.0015.In addition,this method had high accuracy and good repeatability.