PMID- 22459320
OWN - NLM
STAT- MEDLINE
DCOM- 20131226
LR  - 20240318
IS  - 1475-3162 (Electronic)
IS  - 0003-4878 (Print)
IS  - 0003-4878 (Linking)
VI  - 56
IP  - 8
DP  - 2012 Oct
TI  - Organic and elemental carbon filter sets: preparation method and interlaboratory 
      results.
PG  - 959-67
LID - 10.1093/annhyg/mes029 [doi]
AB  - Carbonaceous aerosols play an important role in climate, visibility, air quality, 
      and human health effects, and they have been routinely monitored in workplace and 
      environmental settings. Different thermal analysis methods have been applied to 
      determine the carbon content of carbonaceous aerosols. Good agreement between 
      results for total carbon (TC) generally has been found, but the organic and 
      elemental carbon (OC and EC) fractions determined by different methods often 
      disagree. Measurement uncertainty is mainly due to pyrolysis and charring of OC 
      sample components. Lack of reference materials has impeded progress on method 
      standardization and understanding method biases. A relatively simple method for 
      generating matched filter sets having known OC-EC contents is reported. After 
      generation and analysis of each set to confirm agreement between filters, the 
      filter sets were distributed to six laboratories for an interlaboratory 
      comparison. Analytical results indicate a uniform carbon distribution for the 
      filter sets and good agreement between the participating laboratories. Relative 
      standard deviations (RSDs) for mean TC (OC + EC), OC, and EC results for seven 
      laboratories were <10, 11, and 12% (respectively). Except for one EC result (RSD 
      = 16%), RSDs reported by individual laboratories for TC, OC, and EC were <12%. 
      The method of filter generation is generally applicable and reproducible. 
      Depending on the application, different filter loadings and types of OC materials 
      can be employed. Matched filter sets prepared by the described approach can be 
      used for determining the accuracy of OC-EC methods and thereby contribute to 
      method standardization.
FAU - Chai, Ming
AU  - Chai M
AD  - Department of Civil and Environmental Engineering, University of Cincinnati, 
      Cincinnati, OH 45221, USA.
FAU - Birch, M Eileen
AU  - Birch ME
FAU - Deye, Greg
AU  - Deye G
LA  - eng
PT  - Journal Article
PT  - Research Support, N.I.H., Extramural
DEP - 20120329
PL  - England
TA  - Ann Occup Hyg
JT  - The Annals of occupational hygiene
JID - 0203526
RN  - 0 (Aerosols)
RN  - 0 (Air Pollutants)
RN  - 0 (Particulate Matter)
RN  - 7440-44-0 (Carbon)
SB  - IM
MH  - Aerosols/analysis
MH  - Air Filters
MH  - Air Pollutants/analysis
MH  - Carbon/*analysis/classification
MH  - Environmental Monitoring/*methods
MH  - Filtration/*instrumentation
MH  - Humans
MH  - Particle Size
MH  - Particulate Matter
PMC - PMC3577040
EDAT- 2012/03/31 06:00
MHDA- 2013/12/27 06:00
PMCR- 2013/10/01
CRDT- 2012/03/31 06:00
PHST- 2012/03/31 06:00 [entrez]
PHST- 2012/03/31 06:00 [pubmed]
PHST- 2013/12/27 06:00 [medline]
PHST- 2013/10/01 00:00 [pmc-release]
AID - mes029 [pii]
AID - 10.1093/annhyg/mes029 [doi]
PST - ppublish
SO  - Ann Occup Hyg. 2012 Oct;56(8):959-67. doi: 10.1093/annhyg/mes029. Epub 2012 Mar 
      29.