文献类型：期刊文献

英文题名：Optimization Approaches to Ameliorate Humidity and Vibration Related Issues Using the MicroAeth Black Carbon Monitor for Personal Exposure Measurement

作者：Cai, Jing[1,2];Yan, Beizhan[1];Kinney, Patrick L.[3];Perzanowski, Matthew S.[3];Jung, Kyung-Hwa[4];Li, Tiantian[3];Xiu, Guangli[2];Zhang, Danian[2];Olivo, Cosette[3];Ross, James[1];Miller, Rachel L.[3,4,5];Chillrud, Steven N.[1]

机构：[1]Columbia Univ, Lamont Doherty Earth Observ, Div Geochem, Palisades, NY 10964 USA;[2]E China Univ Sci & Technol, State Environm Protect Key Lab Risk Assessment &, 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 10032 USA;[5]Columbia Univ Coll Phys & Surg, Div Pediat Allergy & Immunol, New York, NY 10032 USA

年份：2013

卷号：47

期号：11

起止页码：1196

外文期刊名：AEROSOL SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20134016793449);WOS:【SCI-EXPANDED(收录号:WOS:000324459700005)】；

基金：This research was supported by National Institute of Environmental Health Sciences (NIEHS) grants (ES016110, ES015905, ES013163, ES009089, ESO13163, and ES008977). We also gratefully thank Jeffrey Blair from Aethlabs (Aethlabs, San Francisco, CA, USA) for meaningful discussions on hardware and software issues. This is Lamont-Doherty Earth Observatory (LDEO) contribution number 7703.

语种：英文

外文关键词：Cleaning - Carbon - Heating

摘要：Exposure to ambient black carbon (BC) is associated with adverse health effects. BC levels display large spatial and temporal variability in many settings, such as cities and rural households where fossil fuel and biomass, respectively, are commonly burned for transportation, heat, and cooking. This article addresses the optimization of the miniaturized personal BC monitor, the microAeth (R) for use in epidemiology studies. To address false positive and negative peaks in real time BC concentrations resulting from changes in temperature and humidity, an inlet with a diffusion drier was developed. In addition, we developed data cleaning algorithms to address occasional false positive and negative fluctuations in BC readings related to physical vibration, due in part to both dirt accumulations in the optical inserts and degraded components. These methods were successfully used to process real-time BC data generated from a cohort of 9-10 year old children (N = 54) in New York City, who wore 1 or 2 microAeth units for six 24h time periods. Two-hour and daily BC averages after data cleaning were consistent with averaged raw data (slopes near 1 with R = 0.99, p < .001; R = 0.95, p < .001, respectively), strongly suggesting that the false positive and negative excursions balance each other out when averaged for at least 2h. Data cleaning of identified suspect events allows more confidence in the interpretation of the real-time personal monitoring data generated in environmental exposure studies, with mean percent difference <10% for 19 duplicate deployments.