内标法测定偏二甲肼中的杂质含量  

Determination of impurities in unsymmetrical dimethylhydrazine by internal standard method

作　　者：杨宝军[1] 陈建平[2] 焦天恕[2] 李志鲲[2] 梁开伦[2] 吕功煊[1] 

机构地区：[1]中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州730000 [2]中国酒泉卫星发射中心,甘肃兰州732750

出　　处：《化学研究与应用》2007年第5期524-526,共3页Chemical Research and Application

摘　　要：The water,dimethylamine and formaldehyde dimethylhydrazone in unsymmetrical dimethylhydrazine were determined by capillary gas chromatographic method with benzene as internal standard.The results showed that good separation effect was obtained with the capillary column SE-54 and weakness of trace impouring imprecisely was avoided by the internal standard method.The method has broad linear scope and the correlation coefficient for water,dimethylamine and formaldehyde dimethylhydrazone is 0.9987,0.9993 and 0.9986 respectively,all approaching 1.The recoveries for water,dimethylamine and formaldehyde dimethylhydrazone in sample are 99.4%,101%and 99.7% separately.In addition,this method had high accuracy and good repetability.The water, dimethylamine and formaldehyde dimethylhydrazone in unsymmetrical dimethylhydrazine were determined by capiUary gas chromatographic method with benzene as internal standard. The results showed that good separation effect was obtained with the capiUary column SE-54 and weakness of trace impouring imprecisely was avoided by the internal standard method. The method has broad linear scope and the correlation coefficient for water, dimethylamine and formaldehyde dimethylhydrazone is 0. 9987, 0. 9993 and 0. 9986 respectively, all approaching 1. The recoveries for water ,dimethylamine and formaldehyde dimethylhydrazone in sample are 99.4%, 101% and 99.7% separately. In addition, this method had high accuracy and good repetability.

关 键 词：毛细管气相色谱 内标法 偏二甲肼 水 二甲胺 偏腙 

分 类 号：O657.71[理学—分析化学]