Performance evaluation of the active-flow personal DataRAM PM2.5 mass monitor (Thermo Anderson pDR-1200) designed for continuous personal exposure measurements
Performance evaluation of the active-flow personal DataRAM PM2.5 mass monitor (Thermo Anderson pDR-1200) designed for continuous personal exposure measurements
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DOI：
10.1016/j.atmosenv.2004.03.007
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发表时间：
2004-06-01
影响因子：
5
通讯作者：
Sioutas, C
中科院分区：
文献类型：
--
作者：
Chakrabarti, B;Fine, PM;Sioutas, C
最近的健康研究表明，在不到几个小时的时间尺度上，颗粒物暴露的影响表明，有必要对个人接触颗粒物进行持续监测。基于过滤器的方法无法测量PM水平的这种短期变化，考虑到人类活动模式，这种变化可能相当重要。本研究的目的是评估PM2.5主动流量个人DataRAM （MIE pDR-1200; Thermo Electron Corp., Franklin， MA）设计的可穿戴式监测设备，用于连续测量颗粒暴露。仪器精度达到2.1%，明显高于之前测试的被动pDR配置。与其他经过验证的连续监测仪进行比较，在低相对湿度下结果一致。在较高湿度下的结果遵循可预测的趋势，并提供了一种修正方案，提高了pDR读数的准确性。pDR对粒径的响应也符合先前观察到的和理论的误差。pDR的主动流动特性允许在备用过滤器上收集采样颗粒。在此过滤器上测量的24小时质量与PM2.5质量的联邦参考方法非常吻合。(C) 2004 Elsevier Ltd.版权所有。
The need for continuous personal monitoring for exposure to particulate matter has been demonstrated by recent health studies showing effects of PM exposure on time scales of less than a few hours. Filter-based methods cannot measure this short-term variation of PM levels, which can be quite significant considering human activity patterns. The goal of this study was to evaluate the active-flow personal DataRAM for PM2.5 (MIE pDR-1200; Thermo Electron Corp., Franklin, MA) designed as a wearable monitor to continuously measure particle exposure. The instrument precision was found to be good (2.1%) and significantly higher than the passive pDR configuration tested previously. A comparison to other proven continuous monitors resulted in good agreement at low relative humidities. Results at higher humidity followed predictable trends and provided a correction scheme that improved the accuracy of pDR readings. The pDR response to particle size also corresponded to previously observed and theoretical errors. The active flow feature of the pDR allows collection of the sampled particles on a back-up filter. The 24-h mass measured on this filter was found to compare very well with a Federal Reference Method for PM2.5 mass. (C) 2004 Elsevier Ltd. All rights reserved.