Abstract: Gas chromatographic internal standard method was considered to determine purity for 1,1-dimethylhydrine(UDMH)instead of the standard working curve method. Weakness of trace impouring imprecisely was avoided by mixing UDMH and internal standard solution. The results show that relative standard deviation approaches 1% and the rate of collection is more than 98.0%.

Key words: Liquid rocket propellant;Hydrazine fuel;Purity;Measurement method;Gas chromatography

摘要： 研究了气相色谱内标法代替常规的标准工作曲线法测定偏二甲肼纯度 (UDMH)。用内标与偏二甲肼混合样品 ,避免了微量进样不准确的缺陷。结果表明 ,该方法相对标准偏差接近于 1% ,回收率大于 98.0 %。

关键词: 液体火箭推进剂;肼类燃料;纯度;测量方法;气相色谱法