光电离-离子迁移谱实验参数与性能研究  

Parameters and performance analysis of photoionization ion mobility spectrometry

作　　者：李虎[1,2] 牛文琪[3] 王鸿梅[1] 黄超群[1] 李建权[1] 沈成银[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]安徽理工大学理学院,安徽淮南232001 [3]安徽农业大学理学院,安徽合肥230036

出　　处：《量子电子学报》2012年第1期8-14,共7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：报道了自主研制的光电离-离子迁移谱装置的基本结构和性能。采用10.6 eV Kr灯为电离源,以苯为检测样品,对迁移电场电压、离子门电压和脉冲宽度参数进行优化,得到最佳装置参数为离子门脉冲宽度0.15 ms,离子门电压80 V,迁移区电压2153 V。使用指数稀释方法制备样品浓度,获得了离子迁移谱检测苯的标准曲线,对苯的检测限为400 ppt,检测线性动态范围跨越三个数量级。The construction and performance study is reported for a newly developed photoionization ion mobility spectrometer （UV-IMS） equipped with a 10.6 eV Kr lamp. The effect of the total voltage of drift tube, voltage and pulse width of ion gate on spectral resolution and sensitivity of UV-IMS were discussed. Their optimal values of pulse width, voltage of ion gate and drift tube are 0.15 ms, 80 V, and 2153 V respectively. The concentrations of benzene were prepared by means of exponential dilution method. The experiments show that the UV-IMS has a limit of detection at 400 ppt for benzene and its measurable linear dynamics range is over three orders of magnitude.

关 键 词：光谱 离子迁移谱 光电离 苯 分辨率 

分 类 号：O659.2[理学—分析化学]