质谱学报2026，Vol.47Issue(1)：1-8,8.DOI:10.7538/zpxb.2025.0035
空气高压放电离子产物在线监测质谱平台的研制及应用
Development and Application of a Mass Spectrometry Platform for On-line Monitoring of Ion Products Generated by High-Voltage Air Discharge
摘要
Abstract
Indoor air pollution poses significant health risks due to particulate matter(PM)and gaseous pollutants.Air negative ions(NAIs)generated by high-voltage discharge can effectively remove PM,but require precise monitoring to optimize performance and assess environmental impacts.However,the existing monitor methods like ion counters and ion mobility spectrometry lack comprehensive compositional analysis.This study developed an online mass spectrometry platform to monitor ion products from air discharge,addressing challenges in detecting low mass-to-charge ratio(m/z)ions such as O-and O2-.The platform integrated a gas generator,adjustable discharge chamber,high-resolution negative ion time-of-flight mass spectrometry(TOF MS).The key optimizations included buffer gas selection and radiofrequency(RF)quadrupole voltage adjustment.Using helium as the buffer gas enhanced ion transmission efficiency,enabling O-detection and increasing O2-sensitivity by 7-fold.Optimizing RF peak-to-peak voltage to 270 V mitigated mass discrimination effect.Further experiments revealed humidity-dependent ion dynamics.O2-intensity decreases with rising relative humidity(10%-90%),while the intensity of O2-(H2O)n clusters(n=1-9)initially increases and then declines,with larger clusters peaking at higher humidity.Electrode material(304/316 stainless steel vs.molybdenum)comparison experiment showed that stainless steel generates more abundant ions,including harmful species like O3-and NO2-,while molybdenum minimizes these byproducts.This platform provides critical insights into NAIs generation mechanisms and environmental interactions.The findings guide electrode material selection and operational parameter optimization for efficient air purification with reduced secondary pollutant emissions,and also can advance NAIs technology for practical applications in indoor air quality management.关键词
飞行时间质谱(TOF MS)/空气负离子(NAIs)/电晕放电Key words
time-of-flight mass spectrometry(TOF MS)/air negative ions(NAIs)/corona discharge分类
化学化工引用本文复制引用
王晨,李海洋,杨明,蒋吉春,曾敏,杨翠霞,唐天宇,陈新厂,陈明丽,花磊..空气高压放电离子产物在线监测质谱平台的研制及应用[J].质谱学报,2026,47(1):1-8,8.基金项目
国家自然科学基金(22027804,22174142) （22027804,22174142）
辽宁省科技计划联合计划(2024JH2/102600010) （2024JH2/102600010）
