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Fading of colorants by atmospheric pollutants: mass spectrometry studies

Grosjean, Daniel and Sensharma, Dilip K. and Cass, Glen R. (1994) Fading of colorants by atmospheric pollutants: mass spectrometry studies. Science of the Total Environment, 152 (2). pp. 125-134. ISSN 0048-9697.

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Chemical ionization mass spectra have been recorded for a number of artists' colorants that fade rapidly when exposed to atmospheric levels of ozone and other photochemical air pollutants. These colorants include the natural colorant curcumin, several indigos and a number of alizarin derivatives. Also included are isatins, which are produced in the fading of indigo colorants by atmospheric pollutants. The protonated molecular ion MH (M = compound mol. wt.) was the most abundant peak in the methane chemical ionization spectra of most of the artists' colorants studied. Other peaks that are of important diagnostic value are discussed for each category of colorant. Examples of applications are included and illustrate the usefulness of chemical ionization mass spectrometry in assessing air pollutant-induced damage to paintings and other colorant-containing objects of artistic and historical value.

Item Type:Article
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Additional Information:© 1994 Elsevier B.V. Received 5 July 1993, Accepted 20 July 1993.
Subject Keywords:Artists' colorants; Mass spectrometry; Art conservation; Air pollution damage to colorants
Issue or Number:2
Record Number:CaltechAUTHORS:20160630-074728067
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Official Citation:Daniel Grosjean, Dilip K. Sensharma, Glen R. Cass, Fading of colorants by atmospheric pollutants: mass spectrometry studies, Science of The Total Environment, Volume 152, Issue 2, 2 August 1994, Pages 125-134, ISSN 0048-9697, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:68778
Deposited By: Ruth Sustaita
Deposited On:05 Jul 2016 21:56
Last Modified:03 Oct 2019 10:16

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