Calibration of an optical particle counter to provide PM2.5 mass for well-defined particle materials
Calibration of an optical particle counter to provide PM2.5 mass for well-defined particle materials
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DOI：
10.1016/j.jaerosci.2006.12.001
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发表时间：
2007-03-01
影响因子：
4.5
通讯作者：
Kasper, G.
中科院分区：
文献类型：
--
作者：
Binnig, J.;Meyer, J.;Kasper, G.
对光散射光学颗粒计数器（OPC）进行了重新校准，用于明确定义的颗粒材料，将光学等效尺寸转换为空气动力学和体积等效直径。对于特定的测试粉尘，经过校准的OPC提供了直接读出的粉尘质量与空气动力学直径的关系，并通过使用标准传输曲线对适当大小的箱进行加权，作为总PM2.5质量。的时间分辨率是在1秒的顺序。本文给出了一个准确的校准方法的超微米颗粒材料的单分散尺寸标准一般是不可用的细节。该过程基于测量空气动力学收集装置与光学颗粒计数器和空气动力学颗粒粒度仪的传输曲线。校准在100多个测试中得到验证，其中袋式除尘器过滤介质的颗粒排放量与重新校准的OPC和PM2.5旋风分离器（BGI SCC）平行记录。OPC和SCC之间的偏差小于20%，约95%的结果，没有系统的偏差。(c)2007爱思唯尔有限公司保留所有权利。
A light scattering optical particle counter (OPC) was re-calibrated for a well-defined particle material, to convert optical equivalent size both into aerodynamic and volume equivalent diameters. For specific test dusts, the calibrated OPC provides a direct read-out dust mass vs. aerodynamic diameter and - by weighting the appropriate size bins with the standard transmission curve - as total PM2.5 mass. The time resolution is in the order of 1 s.The paper gives details of an accurate calibration method for supermicron particle materials where monodisperse size standards are generally unavailable. The procedure is based on measuring the transmission curve of an aerodynamic collection device in parallel with the optical particle counter and an aerodynamic particle sizer.The calibration was verified in more than 100 tests, where particle emissions from bag-house filter media were recorded in parallel with the recalibrated OPC and a PM2.5 cyclone (BGI SCC). The deviation between OPC and SCC is less than 20% for about 95% of the results, with no systematic deviation. (c) 2007 Elsevier Ltd. All rights reserved.