中文摘要：

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。

英文摘要：

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.