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.
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