电喷雾解吸电离质谱法检测多种物质表面黑索今  

MS Rapid Detection of RDX on the Surfaces of Various Materials with Desorption Electrospray Ionization

作　　者：胡燕[1] 陈焕文[1,2] 花榕[1] 胡斌[1] 陈双喜[1] 张燮[1] 周跃明[1] 

机构地区：[1]东华理工大学应用化学系,抚州344000 [2]吉林大学化学院,长春130021

出　　处：《理化检验（化学分册）》2009年第5期504-507,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：国家自然科学基金(20505003);科技部仪器升级改造项目(No.2006SJ156100)资助

摘　　要：在不需要样品制备、预处理的前提下,将电喷雾解吸电离质谱法用于岩石、纸张、布料、皮革、塑料、橡胶等不同表面上黑索今的直接快速检测。在优化试验条件下,用甲醇-乙酸(98+2)混合溶液作为喷雾溶剂,获得质荷比(m/z)223的黑索今准分子离子峰,并且通过串联质谱(MS/MS)分析确定了黑索今碎片特征峰m/z177。不同物质表面上黑索今的检出限(3σ)均小于17.0 pg.cm-2。Desorption electrospray ionization mass spectrometry （DESI-MS） was applied to the rapid detection of trace amounts of RDX on surfaces of various material, including rock, paper, cloth, leather, Teflon, rubber etc. , without sample preparation and pretreatment. Under the optimized operation parameters, the quasimolecular ion peak of RDX at m/z 223 was obtained with a mixture of methanol and acetic acid （98＋2） as the electrospray solvent, and the characteristic peak of the fragment of RDX at m/z 177 was confirmed by MS/MS analysis. Detection limits （3a） of RDX on the surfaces of various materials were less than 17. 0 pg · cm^-2.

关 键 词：电喷雾解吸电离 质谱法 黑索今 快速检测 

分 类 号：O657.63[理学—分析化学]