Validation of MicroAeth (R) as a black carbon monitor for fixed-site measurement and optimization for personal exposure characterization
Cai, J; Yan, B; Ross, J; Zhang, D; Kinney, PL; Perzanowski, MS; Jung, K; Miller, R; Chillrud, SN
HERO ID
2461886
Reference Type
Journal Article
Year
2014
Language
English
PMID
| HERO ID | 2461886 |
|---|---|
| In Press | No |
| Year | 2014 |
| Title | Validation of MicroAeth (R) as a black carbon monitor for fixed-site measurement and optimization for personal exposure characterization |
| Authors | Cai, J; Yan, B; Ross, J; Zhang, D; Kinney, PL; Perzanowski, MS; Jung, K; Miller, R; Chillrud, SN |
| Journal | Aerosol and Air Quality Research |
| Volume | 14 |
| Issue | 1 |
| Page Numbers | 1-9 |
| Abstract | 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). |
| Doi | 10.4209/aaqr.2013.03.0088 |
| Pmid | 25419215 |
| Wosid | WOS:000331789600001 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Keyword | Black carbon; MicroAeth; Personal exposure; Fixed-site monitoring; Humidity |