%0 Journal Article %1 Cai:2014:Aerosol-Air-Qual-Res:25419215 %A Cai, J %A Yan, B %A Ross, J %A Zhang, D %A Kinney, P L %A Perzanowski, M S %A Jung, K %A Miller, R %A Chillrud, S N %D 2014 %J Aerosol Air Qual Res %K %N 1 %P 1-9 %R 10.4209/aaqr.2013.03.0088 %T Validation of MicroAeth as a Black Carbon Monitor for Fixed-Site Measurement and Optimization for Personal Exposure Characterization %U http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4240508/ %V 14 %X This paper reports on validation experiments with the recently developed microAeth�, 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� 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).

@article{Cai:2014:Aerosol-Air-Qual-Res:25419215, abstract = {This paper reports on validation experiments with the recently developed microAeth�, 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� 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).}, added-at = {2023-12-14T15:08:44.000+0100}, author = {Cai, J and Yan, B and Ross, J and Zhang, D and Kinney, P L and Perzanowski, M S and Jung, K and Miller, R and Chillrud, S N}, biburl = {https://www.bibsonomy.org/bibtex/238eac9d299e8e6e3ecfdfb7913aa92af/admin}, doi = {10.4209/aaqr.2013.03.0088}, interhash = {e7b42575320eacaef06f923b263f314f}, intrahash = {38eac9d299e8e6e3ecfdfb7913aa92af}, journal = {Aerosol Air Qual Res}, keywords = {}, month = feb, number = 1, pages = {1-9}, pmid = {25419215}, timestamp = {2023-12-14T15:08:44.000+0100}, title = {Validation of MicroAeth as a Black Carbon Monitor for Fixed-Site Measurement and Optimization for Personal Exposure Characterization}, url = {http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4240508/}, volume = 14, year = 2014 }