酮类有机物放电离子淌度谱研究  

Discharge Ion Mobility Spectrometry of Ketonic Organic Compounds

作　　者：黄国栋[1,2] 韩海燕[1] 贾先德[1] 金顺平[1] 李建权[1] 王鸿梅[1] 唐晓闩[1] 江海河[1] 储焰南[1] 周士康[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所环境光谱学研究室,中国科学院环境光学与技术重点实验室 [2]安庆师范学院物理与电气工程学院,安徽安庆246001

出　　处：《光谱学与光谱分析》2007年第5期833-836,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20577049);安徽省优秀青年科技基金项目(06045098);合肥物质科学研究院院长基金资助

摘　　要：离子淌度谱是一种快速检测痕量挥发性有机物的高灵敏方法。在放电离子源离子淌度谱装置上,研究了八种酮类有机物的离子淌度谱。实验测量了各种离子的约化迁移率,其中丙酮、正丁酮、1-甲基-2-吡咯烷酮、环己酮、苯乙酮的实验结果与前人63Ni放射源离子淌度谱相一致,而甲基异丙基酮、4-甲基-2-戊酮、环戊酮单体和二聚体离子的约化迁移率则是首次报道。实验测量的约化迁移率与离子质量线性相关,获得的对酮类有机物检测灵敏度在ng·L-1量级。Ion mobility spectrometry （IMS） is a sensitive technique for fast on-line monitoring trace volatile organic compounds based upon the mobilities of gas phase ions at ambient pressure in weak electrc field. In the present work, protonated water reactant ions were successfully prepared, and eight ketones were studied on a homemade high-resolution IMS apparatus using a discharge ionization source. The reduced mobility values of all ions were derived from the observed ion mobility spectra. The experimentally determined reduced mobilities for acetone, 2-butone, 1-methyl-2-pyrrolidinone acetophenone, cyclohexanone and product ions were compared with the previously reported values in the Ni-IMS, indicating that they are in good agreement. The reduced mobilities of methyl isopropyl ketone, 4-methyl-2-pentanone and cyclopentanone ions were given for the first time. The ionization process for organic compounds in the authors＇ discharge ion mobility spectrometer is suggested to be similar to Ni-IMS system, i.e. the proton transfer reactions produce protonated ketone ions. In addition, a linear correlation was found between the reduced mobilities of the ketone ions and their molecular masses. Qualitative measurements show that the limit of detection is in the ng·L^-1 order of magnitude in the authors＇ discharge ion mobility spectrometer.

关 键 词：离子淌度谱 酮 挥发性有机物 

分 类 号：O657.3[理学—分析化学]