SYMPOSIA PAPER Published: 01 January 1960
STP45787S

Ultraviolet Spectroscopy: Aromaticity of Carbonaceous Materials; Absorption Errors

Source

Electronic spectra of carbonaceous materials that are devoid of specific absorption bands may be used to determine limits of polynuclear condensed aromaticities in carbonaceous materials. Band intensity and absorption area methods are described. The maximum polynuclear aromaticities of coal and of coal asphaltene are found to be considerably lower than expected and necessitate the presence of large concentrations of saturated structures. Sources of error in absorption spectra of aromatics are discussed. Several methods are described for the detection and quantitative measurement of fluorescence errors in absorption spectra of a solution, at a specific concentration, and of thin films. The path-length-extension method permits quantitative determination of fluorescence nonlinearity through measurements on a single sample.

Author Information

Friedel, R., A.
U. S. Department of the Interior, Pittsburgh, Pa.
Queiser, J., A.
U. S. Department of the Interior, Pittsburgh, Pa.
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Details
Developed by Committee: E13
Pages: 218–226
DOI: 10.1520/STP45787S
ISBN-EB: 978-0-8031-6717-9
ISBN-13: 978-0-8031-6575-5