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).
Description
Validation of MicroAeth® as a Black Carbon Monitor for Fixed-Site Measurement and Optimization for Personal Exposure Characterization
%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 aeth aethalometer black carbon eva21 evaluation micro microaeth
%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 = {2015-11-03T15:34:59.000+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/becker},
description = {Validation of MicroAeth® as a Black Carbon Monitor for Fixed-Site Measurement and Optimization for Personal Exposure Characterization},
doi = {10.4209/aaqr.2013.03.0088},
interhash = {e7b42575320eacaef06f923b263f314f},
intrahash = {38eac9d299e8e6e3ecfdfb7913aa92af},
journal = {Aerosol Air Qual Res},
keywords = {aeth aethalometer black carbon eva21 evaluation micro microaeth},
month = feb,
number = 1,
pages = {1-9},
pmid = {25419215},
timestamp = {2015-11-04T14:53:26.000+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
}