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Pyrolysis/methylation: A microanalytical method for investigating polar organic compounds in cultural properties

AuthorsSáiz-Jiménez, Cesáreo ; Hermosín, Bernardo ; Ortega Calvo, J. J.
Issue Date1994
PublisherGordon and Breach Science Publishers
CitationInternational Journal of Environmental Analytical Chemistry 56(1): 63- 71 (1994)
AbstractThe organic compounds present in weathered surfaces of building stones were investigated using simultaneous pyrolysis/methylation. The method consists of the derivatization of the sample with the alkylating reagent tetramethylammonium hydroxide. Tetramethylammonium salts of organic acids can be converted to methyl ester and the corresponding byproduct in the pyrolysis unit. Hydroxyl groups are also methoxylated. The protection of functional groups permits direct and complete analysis of samples by pyrolysis. No time-consuming solvent extractions, concentrations, derivatizations, and other manipulations which imply the possibility of cross-contamination, are required. The data obtained by solvent extraction and subsequent gas chromatography-mass spectrometry analysis are similar to those obtained by pyrolysis/methylation, proving that this method is an analytical procedure of great sensitivity for investigating organic compounds in inorganic matrices.
Identifiersdoi: 10.1080/03067319408044418
issn: 0306-7319
e-issn: 1029-0397
Appears in Collections:(IRNAS) Artículos
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