气相色谱-质谱法测定大气中偏二甲肼  

GC-MS Determination of Unsymmetrical Dimethylhydrazine in Air

作　　者：曹晔[1,2] 王力 韩卓珍 张光友 刘建国[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所,合肥230031 [2]总装备部防疫大队,北京100101

出　　处：《理化检验（化学分册）》2010年第10期1184-1186,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：总装备部司令部试验技术研究项目(20070116)

摘　　要：利用气泡吸收器富集大气中的偏二甲肼气体,以水杨醛与水以体积比1比50混合的溶液作为吸收液,偏二甲肼经水杨醛于50℃下衍生化3 h后,供气相色谱-质谱法分析检测。结果表明：当采集流量为0.2 L.min-1时,吸收器对偏二甲肼的吸附效率为95%~98%。偏二甲肼的质量浓度在40.0 mg.L-1范围内与其峰面积呈线性关系,方法的检出限（3S/N）为0.878 mg.L-1。测定结果的相对标准偏差（n=6）为2.96%~4.09%,加标回收率为88.0%~93.0%。A bubbling absorber was used for the collection and enrichment of unsymmetrical dimethylhydrazine（UDMH） in air with mixed solution of salicylaldehyde and water（1＋50） as absorbent.The absorbed analyte in absorbent were derivatized with salicylaldehyde at 50 ℃ for 3 h,and analyzed by GC-MS.It was found that when the sampling flow rate was 0.2 L·min-1,the absorption efficiency of UDMH achieved to 95%-98%.Linear relationship between values of peak area and mass concentration of UDMH was obtained in the range within 40.0 mg·L-1,with detection limit（3S/N） of 0.878 mg·L-1.Tests for precision and recovery were made by standard addition method,giving RSD′s（n=6） in the range of 2.96%-4.09% and values of recovery in the range of 88.0%-93.0%.

关 键 词：气相色谱-质谱法 大气 偏二甲肼 衍生化反应 水杨醛 

分 类 号：O657.63[理学—分析化学]