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Title: Loading Effect Correction for Real-time Aethalometer Measurements of Fresh Diesel Soot

Abstract

In this study, a correction was developed for the aethalometer to measure real-time black carbon (BC) concentrations in an environment dominated by fresh diesel soot. The relationship between the actual mass-specific absorption coefficient for BC and the BC-dependent attenuation coefficients was determined from experiments conducted in a diesel exposure chamber that provided constant concentrations of fine particulate matter (PM; PM(2.5); PM < 2.5 microm in aerodynamic diameter) from diesel exhaust. The aethalometer reported BC concentrations decreasing with time from 48.1 to 31.5 microg m(-3) when exposed to constant PM(2.5) concentrations of 55 +/- 1 microg m(-3) and b(scat) = 95 +/- 3 Mm(-1) from diesel exhaust. This apparent decrease in reported light-absorbing PM concentration was used to derive a correction K(ATN) for loading of strong light-absorbing particles onto or into the aethalometer filter tape, which was a function of attenuation of light at 880 nm by the embedded particles.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
Sponsoring Org.:
U. Concepcion/Chile
OSTI Identifier:
925570
Report Number(s):
LBNL-62736
Journal ID: ISSN 1047-3289; JAWAEB; TRN: US200810%%1
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of the Air and Waste Management Association
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 47 OTHER INSTRUMENTATION; SOOT; DIESEL FUELS; MEASURING INSTRUMENTS; REAL TIME SYSTEMS; CORRECTIONS

Citation Formats

Jimenez, Jorge, Claiborn, Candis, Larson, Timothy, Gould, Timothy, Kirchstetter, Thomas W., and Gundel, Lara. Loading Effect Correction for Real-time Aethalometer Measurements of Fresh Diesel Soot. United States: N. p., 2007. Web.
Jimenez, Jorge, Claiborn, Candis, Larson, Timothy, Gould, Timothy, Kirchstetter, Thomas W., & Gundel, Lara. Loading Effect Correction for Real-time Aethalometer Measurements of Fresh Diesel Soot. United States.
Jimenez, Jorge, Claiborn, Candis, Larson, Timothy, Gould, Timothy, Kirchstetter, Thomas W., and Gundel, Lara. Sun . "Loading Effect Correction for Real-time Aethalometer Measurements of Fresh Diesel Soot". United States. doi:.
@article{osti_925570,
title = {Loading Effect Correction for Real-time Aethalometer Measurements of Fresh Diesel Soot},
author = {Jimenez, Jorge and Claiborn, Candis and Larson, Timothy and Gould, Timothy and Kirchstetter, Thomas W. and Gundel, Lara},
abstractNote = {In this study, a correction was developed for the aethalometer to measure real-time black carbon (BC) concentrations in an environment dominated by fresh diesel soot. The relationship between the actual mass-specific absorption coefficient for BC and the BC-dependent attenuation coefficients was determined from experiments conducted in a diesel exposure chamber that provided constant concentrations of fine particulate matter (PM; PM(2.5); PM < 2.5 microm in aerodynamic diameter) from diesel exhaust. The aethalometer reported BC concentrations decreasing with time from 48.1 to 31.5 microg m(-3) when exposed to constant PM(2.5) concentrations of 55 +/- 1 microg m(-3) and b(scat) = 95 +/- 3 Mm(-1) from diesel exhaust. This apparent decrease in reported light-absorbing PM concentration was used to derive a correction K(ATN) for loading of strong light-absorbing particles onto or into the aethalometer filter tape, which was a function of attenuation of light at 880 nm by the embedded particles.},
doi = {},
journal = {Journal of the Air and Waste Management Association},
number = ,
volume = ,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}