Pitfalls in drying oils identification in art objects by gas chromatography

Tsakalof, AK; Bairachtari, KA; Chryssoulakis, ID

dc.contributor.author	Tsakalof, AK	en
dc.contributor.author	Bairachtari, KA	en
dc.contributor.author	Chryssoulakis, ID	en
dc.date.accessioned	2014-03-01T01:24:51Z
dc.date.available	2014-03-01T01:24:51Z
dc.date.issued	2006	en
dc.identifier.issn	1615-9306	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17474
dc.subject	Drying oils	en
dc.subject	Fatty acids	en
dc.subject	GC-MS pitfalls	en
dc.subject	Troubleshooting	en
dc.subject.classification	Chemistry, Analytical	en
dc.subject.other	Composition	en
dc.subject.other	Evaporation	en
dc.subject.other	Fatty acids	en
dc.subject.other	Gas chromatography	en
dc.subject.other	Mass spectrometry	en
dc.subject.other	Painting	en
dc.subject.other	Art objects	en
dc.subject.other	Drying oils identification	en
dc.subject.other	Pitfalls	en
dc.subject.other	Troubleshooting	en
dc.subject.other	Drying oils	en
dc.subject.other	fatty acid	en
dc.subject.other	glass	en
dc.subject.other	oil	en
dc.subject.other	palmitic acid	en
dc.subject.other	stearic acid	en
dc.subject.other	analytical error	en
dc.subject.other	art	en
dc.subject.other	article	en
dc.subject.other	artifact	en
dc.subject.other	calculation	en
dc.subject.other	calibration	en
dc.subject.other	controlled study	en
dc.subject.other	dilution	en
dc.subject.other	evaporation	en
dc.subject.other	gas chromatography	en
dc.subject.other	instrument	en
dc.subject.other	lipid composition	en
dc.subject.other	mass spectrometry	en
dc.subject.other	materials	en
dc.subject.other	painting	en
dc.subject.other	priority journal	en
dc.subject.other	sample	en
dc.subject.other	wool	en
dc.subject.other	Art	en
dc.subject.other	Fatty Acids	en
dc.subject.other	Gas Chromatography-Mass Spectrometry	en
dc.subject.other	Palmitic Acid	en
dc.subject.other	Plant Oils	en
dc.subject.other	Reference Standards	en
dc.subject.other	Stearic Acids	en
dc.title	Pitfalls in drying oils identification in art objects by gas chromatography	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/jssc.200500411	en
heal.identifier.secondary	http://dx.doi.org/10.1002/jssc.200500411	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	Drying oils identification in art objects is an important step in the scientific investigation of the artifact which provides conservators and art historians with valuable information concerning materials used and painting techniques applied. The present communication is devoted to pitfalls and troubleshooting in drying oils identification by means of GC-MS analysis of fatty acids composition in a microsample of an art object. We demonstrate that in the case of nonlinear instrument response the ratios of palmitic to stearic (P/S), distinctive for each oil type and used for drying oil identification, depend on sample dilution so that different dilutions of the same sample can give different P/S ratios. This phenomenon can hinder drying oil identification and lead to erroneous interpretations. This is an important observation as nowadays very often the P/S ratio is calculated from the corresponding peak area ratios or by the use of one-point calibration method. In these approaches, the linearity of the instrument response is not controlled and ensured. In the case analyzed, the nonlinear instrument response was attributed to incomplete sample evaporation in the injector. Packing of the glass liner with deactivated glass wool improved the sample evaporation and ensured the linearity of the instrument response and independence of the P/S ratio from sample dilution. © 2006 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.	en
heal.publisher	WILEY-V C H VERLAG GMBH	en
heal.journalName	Journal of Separation Science	en
dc.identifier.doi	10.1002/jssc.200500411	en
dc.identifier.isi	ISI:000239574100015	en
dc.identifier.volume	29	en
dc.identifier.issue	11	en
dc.identifier.spage	1642	en
dc.identifier.epage	1646	en