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作 者:王莉华[1] 刘保献[1] 张大伟[1] 张人太 安欣欣[1] 魏强[1] WANG Lihua;LIU Baoxian;ZHANG Dawei;ZHANG Rentai;AN Xinxin;WEI Qiang(Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology,Beijing Municipal Environmental Monitoring Center,Beijing100048,China)
机构地区:[1]北京市环境保护监测中心,大气颗粒物监测技术北京市重点实验室,北京100048
出 处:《质谱学报》2018年第1期36-45,共10页Journal of Chinese Mass Spectrometry Society
基 金:环保公益性行业科研专项(201409003);国家重点研发计划(2016YFC0208502)资助
摘 要:在北京市环境保护监测中心空气质量综合观测实验室,使用气溶胶单颗粒飞行时间质谱(SPAMS)对2013年1~12月空气颗粒物开展综合观测。实验结果表明,SPAMS打击率与测径颗粒数(siz)、大气相对湿度、颗粒物组分以及粒径有关。仪器状态正常时,打击率在siz数量小、大气相对湿度低时较高,与含K^+、HSO_4^-、OCEC、NO_3^-的颗粒物以及粒径为0.2~0.3μm、0.3~0.4μm、0.4~0.5μm的颗粒物数量呈正相关,与0.1~0.2μm、0.5~0.6μm、0.6~0.7μm的颗粒物数量呈负相关,含NH_4^+、SiO_3^-颗粒物数量的关系与污染特征及其他环境有关。本研究通过分析打击率数值及打击率与各影响因素的关系判断仪器状态是否正常,这为提前发现常规方法难以发现的仪器故障提供了一种思路。Online analysis of particle source based on single particle aerosol mass spectrometry(SPAMS)was widely used in Beijing,Guangzhou,Shijiazhuang and many other cities in China,because its operation,maintenance and data processing was relatively simple.The differences of different regions and pollution processes can be obtained by building sites all around and analyzing data through networking.And because the monitoring results of SPAMS with different time and place need to be compared,and SPAMS is a semi quantitative detecting method for particulate,so it is especially important to ensure the reliability of the SPAMS’s data.Atmospheric monitoring was conducted in air quality integrated observation laboratory of Beijing Municipal Environmental Monitoring Center by SPAMS during January to December of2013.The results showed that the hit rate of SPAMS was related to amount of particles,relative humidity of atmosphere,particle components and particle size.When the instrument was in normal state,the hit rate was high when the amount of particle was small and the atmospheric relative humidity was low.The hit rate was positively related to the amount of particles which contained K+,HSO4-,OCEC,NO3-as well as particles with the size of0.2-0.3μm,0.3-0.4μm,0.4-0.5μm,and was inversely related to the amount of particles with the size of0.1-0.2μm,0.5-0.6μm,0.6-0.7μm.The relationship between the hit rate and amount of NH4+,SiO3-particles was related to the pollution characteristics and so on.The hit rate was low and the relationship between the hit rate and the impact factors changed when the instrument was in poor condition.This study provided a possible method for judging the status of the instrument,finding the instrument’s failures in advance,and then improving the data quality by analyzing the hit rate and the relationship between the hit rate and the impact factors.Through the method,the fault parts of which the state parameters could not be displayed in the instrument control software could be found.These fault par
关 键 词:PM25 单颗粒气溶胶飞行时间质谱(SPAMS) 打击率 仪器故障
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