作者：刘佳琪¹, 张国城¹, 张景秀², 吴丹¹, 田莹¹, 沈上圯¹, 丑佳¹, 屈晓虎³, 张艳伟³

作者单位：1. 北京市计量检测科学研究院/国家生态环境监测治理产品质量监督检验中心，北京 100029;
2. 北京是卓科技有限公司，北京 102200;
3. 河北先进环保产业创新中心有限公司，河北 石家庄 050035

关键词：光散射法;空气动力学法;粒径谱仪;PM_2.5切割器;捕集效率;单分散;多分散

摘要：

环境标准HJ 93—2013采用气溶胶粒径谱仪检测切割器，但是对选用哪种原理的粒径谱仪未明确要求。该文分别利用光散射法和空气动力学法粒径谱仪对同一台旋风式PM_2.5切割器进行检测，结果发现使用8个粒径单分散聚苯乙烯微球时，两种仪器都能得到预期的捕集效率曲线，相关参数也都合格。光散射粒径谱仪测量结果受颗粒种类影响显著，相比之下，动力学粒径谱仪测量结果基本不受颗粒物种类影响。结果表明，如果采用8个粒径单分散聚苯乙烯微球检测切割器，光散射或动力学法粒径谱仪都可以，结果差异不大，但是如果为了提高检测效率，采用混合多分散粒子，则只有动力学法粒径谱仪能满足要求。

Study on the difference of particle size spectrometer between light scattering method and aerodynamic method in the evaluation of PM_2.5 cutter
LIU Jiaqi¹, ZHANG Guocheng¹, ZHANG Jingxiu², WU Dan¹, TIAN Ying¹, SHEN Shangyi¹, CHOU Jia¹, QU Xiaohu³, ZHANG Yanwei³
1. Beijing Institute of Metrology/National Quality Supervision and Inspection Center for Ecological & Environmental Products, Beijing 100029, China;
2. Beijing Shizhuo Technology Co., Ltd., Beijing 102200, China;
3. Hebei Advanced Environmental Protection Industry Innovation Center Co., Ltd., Shijiazhuang 050035, China
Abstract: HJ 93—2013 adopts aerosol particle size spectrometer to detect the cutter, but there is no clear requirement on which principle particle size spectrometer should be selected. In this paper, the same cyclone PM_2.5 cutter was detected by light scattering and aerodynamic particle size spectrometers. The results showed that when using 8 sizes of mono-disperse polystyrene microspheres, the expected capture efficiency curves can be obtained by both instruments, and the relevant parameters were also qualified. The measurement results of light scattering particle size spectrometer were significantly affected by particle type, while the measurement results of aerodynamic particle size spectrometer were basically independent of particle type. The results showed that if 8 particle size monodisperse polystyrene microspheres are used to detect the cutter, light scattering or aerodynamic particle size spectrometer can be used, the results are not much different, but if the mixed polydisperse particles are used in order to improve the detection efficiency, only the aerodynamic particle size spectrometer can meet the requirements.
Keywords: light scattering method;aerodynamic method;spectrometer;PM_2.5 cutter;trapping efficiency;mono-dispersed;multi-dispersed
2024, 50(5):93-99  收稿日期: 2023-11-20;收到修改稿日期: 2024-01-17
基金项目:  中关村开放实验室成果转化概念验证项目（20220481111）；国家市场监督管理总局科技计划项目（2021MK003，2023MK001）；中央引导地方科技发展资金项目（科技成果转移转化项目）（226Z3901G）
作者简介: 刘佳琪(1990-),女,河北邯郸市人,副高级工程师,博士,主要从事颗粒物相关环境监测仪器研究。
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