基于颗粒物发生器的β射线法PM_(2.5)监测仪性能研究  

Study on the Performance of A PM_(2.5)Monitor Usingβ-ray Method Based on Particulate Matter Generator

作　　者：孟环 张健 罗霄旭 李海军 杨梦 焦夕钰 沈秀娥 MENG Huan;ZHANG Jian;LUO Xiao-xu;LI Hai-jun;YANG Meng;JIAO Xi-yu;SHEN Xiu-e(Beijing Municipal Ecological Environmental Monitoring Center,Beijing 100048,China;Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology,Beijing 100048,China)

机构地区：[1]北京市生态环境监测中心,北京100048 [2]大气颗粒物监测技术北京市重点实验室,北京100048

出　　处：《环境科技》2025年第2期62-67,共6页Environmental Science and Technology

基　　金：北京市科技计划项目(Z231100003823018).

摘　　要：采用颗粒物发生器产生不同浓度的颗粒物,通过粒径谱仪和手工称重判断发生浓度的稳定性和准确性后,连接β射线法PM_(2.5)监测仪开展性能研究。结果表明,颗粒物粒径(均在2.5μm以下)和发生浓度均具有良好的稳定性。发生浓度真实可靠,手工称重结果与发生浓度呈较好的线性关系(r>0.995)。颗粒物发生器接入β射线法PM_(2.5)监测仪后,监测数据稳定性较好(RSD<5%),在线监测结果与发生浓度呈较好的线性关系(r>0.999)。同时总结了监测仪在正常运行和质控过程中的数据变化规律,通过结合不同测量单元的特性,可为监测人员提供实时、真实、平稳的数据。Particulate matter with different concentrations was generated by particle generator,and the stability and accuracy of concentration were evaluated by particle size spectrometer and manual weighing,and the performance of a PM_(2.5) monitor usingβ-ray method was studied.The results showed that the particle size(all below 2.5μm)and concentration had good stability.The occurrence concentration was real and reliable,and there was a good linear relationship between weighing results and occurrence concentration(r>0.995).When the particulate matter generator was connected to the PM_(2.5) monitor usingβ-ray method,the monitoring data had good stability(RSD<5%),and the online monitoring results had a good linear relationship with the occurrence concentration(r>0.999).The data change rule of the monitor in normal operation and quality control process was summarized.By combining the characteristics of different measurement units,real-time,real and stable data can be provided.

关 键 词：标准颗粒 自动监测 准确性 

分 类 号：X8[环境科学与工程—环境工程]