TY - JOUR
T1 - An in situ, Time-resolved analyzer for aerosol organic and elemental carbon
AU - Turpin, B. J.
AU - Cary, R. A.
AU - Huntzicker, J. J.
N1 - Funding Information:
This research was sponsored in part by grant No. R808087-01 from the U.S. Environmental Protection Agency (EPA) for the developmental work and by Contract A5-149-32 from the California Air Resources Board for the field work associated with the Carbonaceous Species Methods Comparison Study. The California Air Resources Board also supplied the ozone data and the trailer which housed the carbon analyzer during the study. The participation of Dr. Richard L. Johnson in the early stage of the developmental work is gratefully acknowledged as is the assistance of Dr. John Rau during the field study.
PY - 1990
Y1 - 1990
N2 - An in situ carbon analyzer has been developed to investigate the aerosol chemistry of organic carbon. Uncertainties because of sample handling and loss of organic carbon during storage were eliminated by combining the sampling and analysis functions into a single instrument which could operate on a time cycle as short as 90 minutes. Carbon analysis was accomplished with a thermal-optical method with corrections made for the vapor adsorption artifact and for pyrolytic conversion of organic to elemental carbon during the carbon analysis. Total aerosol carbon uncertainties are 3.1% with detection limits of 0.2 μg of carbon. The in situ carbon analyzer was operated during the Carbonaceous Species Methods Comparison Study in Glendora, California, in the summer of 1986. Concentrations of total, organic, and elemental carbon showed strong diurnal variations with peaks occurring during the daylight hours. Comparison of the diurnal profile of organic carbon with those of elemental carbon, a tracer for primary combustion aerosol, and ozone, and indicator of photochemical activity, provided evidence for the secondary formation of organic aerosol in the atmosphere.
AB - An in situ carbon analyzer has been developed to investigate the aerosol chemistry of organic carbon. Uncertainties because of sample handling and loss of organic carbon during storage were eliminated by combining the sampling and analysis functions into a single instrument which could operate on a time cycle as short as 90 minutes. Carbon analysis was accomplished with a thermal-optical method with corrections made for the vapor adsorption artifact and for pyrolytic conversion of organic to elemental carbon during the carbon analysis. Total aerosol carbon uncertainties are 3.1% with detection limits of 0.2 μg of carbon. The in situ carbon analyzer was operated during the Carbonaceous Species Methods Comparison Study in Glendora, California, in the summer of 1986. Concentrations of total, organic, and elemental carbon showed strong diurnal variations with peaks occurring during the daylight hours. Comparison of the diurnal profile of organic carbon with those of elemental carbon, a tracer for primary combustion aerosol, and ozone, and indicator of photochemical activity, provided evidence for the secondary formation of organic aerosol in the atmosphere.
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U2 - 10.1080/02786829008959336
DO - 10.1080/02786829008959336
M3 - Article
AN - SCOPUS:0025198560
SN - 0278-6826
VL - 12
SP - 161
EP - 171
JO - Aerosol Science and Technology
JF - Aerosol Science and Technology
IS - 1
ER -