量子电子学报, 2013, 30 (2): 138, 网络出版: 2013-04-07
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
光谱学 离子迁移谱 光电效应 光电子源 四氯化碳 spectroscopy ion mobility spectrometry photoemission photoelectron source tetrachloromethane
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CCl4 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CCl4 的检测限 达到4 ppb, 线性范围跨越2个数量级。
Abstract
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 CCl4 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 CCl4 and its measurable linear dynamics range is over two orders of magnitude in the optimized experimental parameters.
苏得生, 牛文琪, 刘升, 沈成银, 黄超群, 王鸿梅, 江海河, 储焰南. 新型光电子源离子迁移谱在检测四氯化碳中的应用[J]. 量子电子学报, 2013, 30(2): 138. SU De-sheng, NIU Wen-qi, LIU sheng, SHEN Cheng-yin, HUANG Chao-qun, WANG Hong-mei, JIANG Hai-he, CHU Yan-nan. Detection of tetrachloromethane by a new photoemission ion mobility spectrometry[J]. Chinese Journal of Quantum Electronics, 2013, 30(2): 138.