基于离子迁移谱及一氧化氮掺杂检测甲硫醇  

Detection for methyl mercaptan by ion mobility spectrometry doped with nitric oxide

作　　者：林建华 赵亚群 贾建 高晓光 何秀丽 LIN Jianhua;ZHAO Yaqun;JIA Jian;GAO Xiaoguang;HE Xiuli(State Key Laboratory of Transducer Technology,Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100190,China;School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院空天信息创新研究院,传感技术国家重点实验室,北京100190 [2]中国科学院大学电子电气与通讯工程学院,北京100049

出　　处：《分析试验室》2023年第6期717-722,共6页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金项目(62031022,62071453,61871364)资助。

摘　　要：针对低浓度甲硫醇快速检测需求,开展了以一氧化氮作为掺杂剂的离子迁移谱检测方法研究。设计并搭建了电晕放电离子迁移谱检测系统,优化了系统工作参数:漂移管工作温度180℃,放电电压10.5 kV,掺杂流量160 mL/min,进样流量150 mL/min。在优化参数下检测不同浓度的甲硫醇气体标准样品,结果表明掺杂一氧化氮明显提高了检测甲硫醇的灵敏度,理论检出限可达4.2×10^(-4) mg/m^(3),满足国家标准一级厂界要求。To meet the demand of rapid detection of methyl mercaptan at low concentration,the ion mobility spectrometric method using nitric oxide as dopant was proposed.The ion mobility spectrometry system with corona discharge source was designed and constructed.The system operating parameters were optimized as follows:the working temperature of the drift tube of 180℃,the discharge voltage of 10.5 kV,the doping flow rate of 160 mL/min,and the injection flow rate of 150 mL/min.MM standard gas samples with different concentrations were detected under the optimized parameters.The results showed that the doping of nitric oxide improved the detection sensitivity significantly,and the theoretical detection limit arrived at 4.2×10^(-4) mg/m^(3),which met the demand of low concentration detection of MM.

关 键 词：甲硫醇 离子迁移谱 一氧化氮 掺杂剂 

分 类 号：O657[理学—分析化学] TP212[理学—化学]