文献类型：期刊文献

英文题名：Validation of MicroAeth? as a Black Carbon Monitor for Fixed-Site Measurement and Optimization for Personal Exposure Characterization

作者：Cai, Jing[1,2];Yan, Beizhan[1];Ross, James[1];Zhang, Danian[2];Kinney, Patrick L.[3];Perzanowski, Matthew S.[3];Jung, KyungHwa[4];Miller, Rachel[3,4,5];Chillrud, Steven N.[1]

机构：[1]Columbia Univ, Lamont Doherty Earth Observ, New York, NY 10027 USA;[2]E China Univ Sci & Technol, Sch Resource & Environm Engn, Shanghai 200237, Peoples R China;[3]Columbia Univ, Mailman Sch Publ Hlth, Dept Environm Hlth Sci, New York, NY USA;[4]Columbia Univ, Coll Phys & Surg, Div Pulm Allergy & Crit Care, New York, NY USA;[5]Columbia Univ, Coll Phys & Surg, Div Pediat Allergy & Immunol, New York, NY USA

年份：2014

卷号：14

期号：1

起止页码：1

外文期刊名：AEROSOL AND AIR QUALITY RESEARCH

收录：;EI(收录号：20140617270199);WOS:【SCI-EXPANDED(收录号:WOS:000331789600001)】；

基金：This research is supported by NIEHS grants (ES016110, ES015905, ES013163 and ES009089). Miss. Cosette Olivo is specially thanked for help in unit testing. This is LDEO contribution number 7729.

语种：英文

外文关键词：Black carbon; MicroAeth; Personal exposure; Fixed-site monitoring; Humidity

摘要：This paper reports on validation experiments with the recently developed microAeth (R), a pocket-sized device which is able to obtain real-time and personal measurements of black carbon (BC) aerosol. High reproducibility was observed when comparing the results from six new individual units during fixed-site monitoring out of a window (relative standard deviation [RSD] = 8% +/- 5%, N = 1442). The results obtained from the microAeth devices agreed with those obtained from a full size rack mounted Aethalometer, based on both the 1-minute data (R = 0.92, slope = 1.01 +/- 0.01, N = 1380) and 24-h average data. The 24-h average of real time data obtained from the microAeths was comparable to the BC concentration obtained from 24-h integrated PM2.5 filter deposits, as determined by multi-wavelength optical absorption (R = 0.98, slope = 0.92 +/- 0.07, N = 12). Rapid environmental changes in relative humidity (RH) and temperature (T) can result in false positive and negative peaks in the real time BC concentrations, though averages > 1-2-hour are only minimally affected. An inlet with a diffusion drier based on Nafion (R) tubing was developed in order to use BC data with a high time resolution. The data shows that the diffusion drier greatly reduce the impacts from rapid changes in RH and T when the monitoring system is worn in close proximity to the body (e. g., in the vest pocket).