真空紫外灯单光子电离源的优化及在线检测痕量VOCs的应用  

Optimization of vacuum ultraviolet single photon ionization source and application of rapid detection of trace volatile organic compounds

作　　者：麦泽彬 戴娇娇 谭国斌 颜世超 陈文木 高英楠 许春华 Mai Zebin;Dai Jiaojiao;Tan Guobin;Yan Shichao;Chen Wenmu;Gao Yingnan;Xu Chunhua(Guangzhou Hexin Instrument Co.,Ltd.,Guangzhou 510535,China)

机构地区：[1]广州禾信仪器股份有限公司,广州510535

出　　处：《分析仪器》2023年第5期77-84,共8页Analytical Instrumentation

基　　金：国家科技重大专项(J2019-V-0005-0098)经费资助。

摘　　要：依据快速、准确测量大气环境中痕量挥发性有机物(VOCs)的需求,对单光子电离源进行优化,优化后搭载于飞行时间质谱使用,最低检测限8.9×10^(-12)(体积比),线性动态范围6个量级,不仅可以用于排放源的在线检测,也可以满足大气环境中痕量VOCs在线检测的需求。仪器与预浓缩气相色谱-质谱联用仪开展了48 h的室外空气中痕量VOCs在线对比监测,结果显示两者检测到痕量苯乙烯浓度变化趋势高度一致且检测结果相近,为在线检测痕量VOCs提供了新方法。Based on the demand for rapid and accurate measurement of trace volatile organic compounds(VOCs)in the atmospheric environment,the single photon ionization source was optimized and used in time-of-flight mass spectrometry.The minimum detection limit of the instrument was 8.9×10^(-12)(V/V),the linear dynamic range was 1—106.The instrument is not only suitable for online detection of emission sources,but also for online detection of trace VOCs in the atmospheric environment.The instrument and the preconcentration gas chromatography—mass spectrometry(GC/MS)carried out a comparative monitoring of trace VOCs in outdoor air for 48 hours.The results showed that the change trend of trace styrene concentration detected by the two methods was highly consistent and the detection results were similar,providing a new method for online detection of trace VOCs.

关 键 词：真空紫外灯单光子电离源 痕量挥发性有机物质 飞行时间质谱 在线检测 

分 类 号：X831[环境科学与工程—环境工程] O657.63[理学—分析化学]