化学电离质谱法检测天然气泄漏  

Detection of natural gas leakage by chemical ionization mass spectrometry

作　　者：任敏 陈吉文 REN Min;CHEN Jiwen(College of Electrical and Control Engineering,North China University of Technology,Beijing 100144,China)

机构地区：[1]北方工业大学电气与控制工程学院,北京100144

出　　处：《分析试验室》2025年第3期366-370,共5页Chinese Journal of Analysis Laboratory

基　　金：北京市自然科学基金和北京市教育委员会科技计划重点项目(KZ202110009013)资助。

摘　　要：本研究利用化学电离质谱法对模拟天然气组分的标准气体进行检测。实验结果表明,质子转移反应对天然气中的臭味剂四氢噻吩有很好的检测效果,四氢噻吩的检测限达到9.25μg/m^(3);电子转移反应对天然气中的丙烷有很好的检测效果,丙烷的检出限达到63μg/m^(3);相对标准偏差(RSD)为1.5%~1.9%。本方法可以满足天然气早期痕量泄漏检测需求,提高了天然气早期泄漏的预警能力,为天然气早期泄漏预警检测提供了新的方法。The chemical ionization mass spectrometry was used to detect the simulated natural gas components of the standard gas.The experiment results showed that the proton transfer reaction can well detect the odourant tetrahydrothiophene in natural gas,and the detection limit of tetrahydrothiophene reached 9.25μg/m^(3);while the electron transfer reaction can well detect the propane in natural gas,and the detection limit of propane was 63μg/m^(3);and the relative standard deviations(RSDs)were 1.5%?1.9%.This method can fully meet the demand of early trace leakage detection of natural gas,greatly improving the early warning capability of natural gas leakage and providing a new method for the early warning detection of natural gas leakage.

关 键 词：天然气泄漏 化学电离 痕量检测 四氢噻吩 

分 类 号：O657.63[理学—分析化学] X830.7[理学—化学]