Quantitative method using differential infrared spectrometry for the determination of compound types absorbing in the carbonyl region in asphalts

Journal Article · Tue Dec 31 23:00:00 EST 1974 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac60351a037· OSTI ID:7283094

Petersen, J C

A method for the qualitative and quantitative determination of ketones, dicarboxylic anhydrides, carboxylic acids, and 2-quinolone types in asphalts is presented. The technique is based on differential infrared spectrometry combined with base hydrolysis and silylation reactions. Determinations are made using simple laboratory equipment without the necessity of reagent or reaction product separation. The method was applied to a collection of asphalts to show the effect of oxidation in road service on the production of the title compound types. Ketones were found to be the major oxidation product absorbing in the carbonyl region. Dicarboxylic anhydrides were formed on oxidation in considerably greater amounts than carboxylic acids. 2-Quinolones were not formed on oxidation. Significant amounts of ketones and detectable amounts of carboxylic anhydrides were not found in fresh, unoxidized asphalts although carboxylic acids and 2-quinolone types were often present. (auth)

• Research Organization: Bureau of Mines, Laramie, WY
• OSTI ID: 7283094
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 47:1; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
ANHYDRIDES
ASPHALTS
AZINES
BITUMENS
CARBOXYLIC ACIDS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
DICARBOXYLIC ACIDS
HETEROCYCLIC COMPOUNDS
INFRARED SPECTRA
KETONES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDATION
PYRIDINES
QUINOLINES
SPECTRA
TAR