作者：刘佳琪, 张国城, 吴丹, 沈上圯, 荆文杰, 赵晓宁

作者单位：北京市计量检测科学研究院，北京 100029

关键词：亚利桑那尘;聚苯乙烯微球;切割器;捕集效率;性能评价

摘要：

在切割器捕集效率评价过程中，选用不同种类的颗粒物可能会对切割器的评价结果产生不同的影响。通过搭建基于静态箱法的切割器评价系统，可测量并拟合得到切割器的捕集效率曲线。分别使用多分散的亚利桑那尘及不同粒径的单分散聚苯乙烯标准微球对国产及进口的PM_2.5切割器、进口的PM₁切割器进行评价，对比评价结果发现使用亚利桑那尘评价、拟合得到的切割器50%切割粒径与使用单分散聚苯乙烯微球得到的结果存在差异，并且根据空气动力学粒径谱仪的粒径识别原理对产生此结果的原因进行分析。该研究结果对于切割器的性能评价有一定的科学意义，可为环保监测数据准确性的提升提供参考。

Research on the influence of different kinds of particulate matter on the performance evaluation results of cutter
LIU Jiaqi, ZHANG Guocheng, WU Dan, SHEN Shangyi, JING Wenjie, ZHAO Xiaoning
Beijing Institute of Metrology, Beijing 100029, China
Abstract: In the process of performance evaluation of cutters, different kinds of particulate matters utilized could make a difference on the results. By building a cutter evaluation system based on static box method, the capture efficiency curve of the cutter can be measured and fitted. Respectively using multiple decentralized Arizona dust and different particle sizes of monodisperse polystyrene microspheres on evaluation of domestic and imported PM_2.5 and PM₁ cutters, the evaluation results were compared to show that the 50% cutting diameter of cutters measured by Arizona dust were less than polystyrene microspheres. The results were analysed to be related with the principle of particle identification of the aerodynamics size spectrometer. The research results are of scientific significance to the performance evaluation of the cutter and provide a reference for the improvement of the accuracy of environmental monitoring data.
Keywords: Arizona dust;polystyrene microsphere;cutter;capture efficiency;performance evaluation
2022, 48(1):27-31  收稿日期: 2021-01-07;收到修改稿日期: 2021-03-04
基金项目: 中国博士后科学基金面上资助项目（2019M660538）；国家质量基础的共性技术研究与应用国家重点研发计划（2017YFF0205504）
作者简介: 刘佳琪（1990-），女，河北邯郸市人，工程师，博士，主要从事环境监测仪器计量工作
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