Jiang Ruo-Ting, Acevedo-Bolton Viviana, Cheng Kai-Chung, Klepeis Neil E, Ott Wayne R, Hildemann Lynn M
Civil & Environmental Engineering Dept, Stanford University, Stanford, CA 94305, USA.
J Environ Monit. 2011 Jun;13(6):1695-702. doi: 10.1039/c0em00732c. Epub 2011 May 17.
The amount of light scattered by airborne particles inside an aerosol photometer will vary not only with the mass concentration, but also with particle properties such as size, shape, and composition. This study conducted controlled experiments to compare the measurements of a real-time photometer, the SidePak AM510 monitor (SidePak), with gravimetric mass. PM sources tested were outdoor aerosols, and four indoor combustion sources: cigarettes, incense, wood chips, and toasting bread. The calibration factor for rescaling the SidePak measurements to agree with gravimetric mass was similar for the cigarette and incense sources, but different for burning wood chips and toasting bread. The calibration factors for ambient urban aerosols differed substantially from day to day, due to variations in the sources and composition of outdoor PM. A field evaluation inside a casino with active smokers yielded calibration factors consistent with those obtained in the controlled experiments with cigarette smoke.
气溶胶光度计内空气中悬浮颗粒散射的光量不仅会随质量浓度变化，还会随颗粒特性（如大小、形状和成分）而变化。本研究进行了对照实验，以比较实时光度计SidePak AM510监测仪（SidePak）的测量结果与重量法测定的质量。测试的颗粒物来源包括室外气溶胶以及四种室内燃烧源：香烟、香、木片和烤面包。将SidePak测量结果重新校准以与重量法质量一致的校准因子，对于香烟和香来源相似，但对于燃烧木片和烤面包则不同。由于室外颗粒物来源和成分的变化，城市环境气溶胶的校准因子每天都有很大差异。在有吸烟者活动的赌场进行的现场评估得出的校准因子与在香烟烟雾对照实验中获得的校准因子一致。
