Consistency and traceability of black carbon measurements made by laser-induced incandescence, thermal-optical transmittance, and filter-based photo-absorption techniques

Y. Kondo, L. Sahu, N. Moteki, Firoz Khan, N. Takegawa, X. Liu, M. Koike, T. Miyakawa

Research output: Contribution to journalArticle

107 Citations (Scopus)

Abstract

In this study, we show that black carbon (BC) mass concentrations measured by different techniques are consistent and traceable. First, we present the volatilities of 13 organic compounds passed through a heated inlet. These data were used to quantify the interference of organic aerosols on the BC measurement techniques. The masses of the refractory particles that incandesce (m ref) were used to calibrate BC mass measured by a single-particle soot photometer (SP2), which uses laser-induced incandescence. This calibration was influenced little by refractory organics and agreed well with that of fullerene soot, which indicates the consistency of the standards. We estimated the interference of pyrolyzed refractory organics on the BC measured with a filter-based absorption photometer continuous soot monitoring system (COSMOS) with a heated inlet to be small in Asia. This was also confirmed by the stable mass absorption cross section (MAC) obtained by the high correlations between BC mass concentrations measured by COSMOS (MCOSMOS) and those measured by the thermal-optical transmittance method (MTOT) (Kondo et al. 2009). MCOSMOS was also compared with total BC mass concentrations measured with an SP2 (MSP2) in Tokyo in 2009. MCOSMOS and MSP2 were highly correlated (r2= 0.97) and agreed to within about 10% on average. These results demonstrate that MSP2, MCOSMOS, and MTOT were nearly identical. Use of the masses of incandescing refractory BC particles for calibration of BC mass concentrations determined by different techniques gave consistent results.

Original languageEnglish
Pages (from-to)295-312
Number of pages18
JournalAerosol Science and Technology
Volume45
Issue number2
DOIs
Publication statusPublished - Feb 2011
Externally publishedYes

Fingerprint

Soot
Optical filters
transmittance
Opacity
black carbon
Carbon black
laser
filter
Lasers
soot
Refractory materials
Photometers
photometer
monitoring system
Calibration
calibration
fullerene
Hot Temperature
Monitoring
Fullerenes

ASJC Scopus subject areas

  • Materials Science(all)
  • Environmental Chemistry
  • Pollution

Cite this

Consistency and traceability of black carbon measurements made by laser-induced incandescence, thermal-optical transmittance, and filter-based photo-absorption techniques. / Kondo, Y.; Sahu, L.; Moteki, N.; Khan, Firoz; Takegawa, N.; Liu, X.; Koike, M.; Miyakawa, T.

In: Aerosol Science and Technology, Vol. 45, No. 2, 02.2011, p. 295-312.

Research output: Contribution to journalArticle

Kondo, Y. ; Sahu, L. ; Moteki, N. ; Khan, Firoz ; Takegawa, N. ; Liu, X. ; Koike, M. ; Miyakawa, T. / Consistency and traceability of black carbon measurements made by laser-induced incandescence, thermal-optical transmittance, and filter-based photo-absorption techniques. In: Aerosol Science and Technology. 2011 ; Vol. 45, No. 2. pp. 295-312.
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