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Soot in Urban Atmospheres: Determination by an Optical Absorption Technique

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Science  16 May 1980:
Vol. 208, Issue 4445, pp. 741-744
DOI: 10.1126/science.208.4445.741


We have used the high optical absorptivity of urban and source particulates to trace their "graphitic" component. The optical absorptivity and the particulate carbon loading show a strong correlation. Analyses of the data indicate that primary soot emissions compose a major fraction of the carbonaceous aerosol and put a low limit on secondary organic material produced in correlation with the ozone concentration.