新型光电子源离子迁移谱在检测四氯化碳中的应用  

Detection of tetrachloromethane by a new photoemission ion mobility spectrometry

作　　者：苏得生[1] 牛文琪[2] 刘升[1] 沈成银[1] 黄超群[1] 王鸿梅[1] 江海河[1] 储焰南[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,安徽合肥230031 [2]安徽农业大学理学院,安徽合肥230036

出　　处：《量子电子学报》2013年第2期138-145,共8页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(20907054);中国科学院创新工程重要方向项目(KGCX2-YW-917)

摘　　要：利用紫外光照射金属表面产生电子作为离子源,建立了一套光电子源离子迁移谱仪,由于卤化物具有较强的吸附电子能力,该装置可以应用于卤化物的检测。使用CCl_4样品,得到了该装置的离子峰强度、半峰宽、分辨率随迁移管电场、离子门脉宽、离子门电压的变化关系,并进行了简单的理论分析。兼顾离子峰强度与分辨率,得到了优化的实验参数,在该参数下CCl_4的检测限达到4 ppb,线性范围跨越2个数量级。With a photoelectron source induced by ultraviolet radiation on mental surface, a photoemission ion mobility spectrometry （PE-IMS） was set -up, which can be used to detect halide since halide has a good ability to attach electron. Using CC14 sample, the evolutions of the ion intensity, full width at half maximum and resolution versus drift electric field, ion gate pulse width and ion gate voltage were obtained, and the reasons for the evolutions were analyzed simply. Taking into account both ion intensity and resolution optimized experimental parameters were obtained. The PE-IMS has a limit of detection at 4 ppb for CC14 and its measurable linear dynamics range is over two orders of magnitude in the optimized experimental parameters.

关 键 词：光谱学 离子迁移谱 光电效应 光电子源 四氯化碳 

分 类 号：O659.2[理学—分析化学]