Comparison of four mobility particle sizers with different time resolution for stationary exposure measurements
Comparison of four mobility particle sizers with different time resolution for stationary exposure measurements
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DOI：
10.1007/s11051-009-9679-x
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发表时间：
2009-10-01
影响因子：
2.5
通讯作者：
Kuhlbusch, Thomas A. J.
中科院分区：
文献类型：
--
作者：
Asbach, Christof;Kaminski, Heinz;Kuhlbusch, Thomas A. J.
近年来，接触空气中的超细颗粒和纳米颗粒引起了越来越多的关注，因为它们可能会对健康造成不利影响。量化空气颗粒暴露的常见方法是通过电迁移率分析来测量颗粒数量尺寸分布。对四种迁移率粒度仪进行了详细的比对研究：一台 TSI 快速迁移率粒度仪 (FMPS)、一台格林序贯迁移率粒度仪 (SMPS+C) 和两台 TSI 扫描迁移率粒度仪 (SMPS)，配备两种不同的凝结粒子计数器 (CPC)。这些仪器受到氯化钠或柴油烟灰颗粒的挑战。结果表明，所有测试仪器的粒度都相似，只有 FMPS 粒度分布始终向较小的粒度转变。 Grimm SMPS 通常比 TSI 仪器测量更高的浓度和更广泛的分布。两个格林 DMA 彼此非常吻合；然而，TSI SMPS 结果显示出对流速的可重复依赖性。虽然 TSI 和 Grimm SMPS 对氯化钠 (NaCl) 和柴油机烟灰提供了一致的结果，但 FMPS 对变化的颗粒源的反应似乎与 SMPS 不同，这可能是由不同的形态或颗粒尺寸依赖性效应引起的。对于 NaCl 颗粒，FMPS 提供与 TSI SMPS 相当的最窄分布和浓度，而对于柴油机烟灰，它提供比 TSI SMPS 最广泛的分布和更高浓度。
Exposure to airborne ultrafine and nanoparticles has raised increased interest over the recent years as they may cause adverse health effects. A common way to quantify exposure to airborne particles is to measure particle number size distributions through electrical mobility analysis. Four mobility particle sizers have been subject to a detailed intercomparison study, a TSI Fast Mobility Particle Sizer (FMPS), a Grimm Sequential Mobility Particle Sizer (SMPS+C), and two TSI Scanning Mobility Particle Sizers (SMPSs), equipped with two different condensation particle counters (CPC). The instruments were challenged with either NaCl or diesel soot particles. The results indicate that the sizing of all tested instrument was similar with only the FMPS size distributions consistently shifted toward smaller particle sizes. The Grimm SMPS generally measured higher concentrations and broader distributions than the TSI instruments. The two Grimm DMAs agreed well with each other; however, the TSI SMPS results showed a reproducible dependence on the flow rates. While TSI and Grimm SMPS delivered consistent results for sodium chloride (NaCl) and diesel soot, the FMPS seemed to react differently to the changing particle source than the SMPSs, which may be caused by either the different morphology or particle size dependent effects. For NaCl particles, the FMPS delivered the narrowest distributions and concentrations comparable with TSI SMPSs, whereas for diesel soot, it delivered the broadest distributions and higher concentrations than TSI SMPSs.