Curie-point Pyrolysis/Gas Chromatography/Mass Spectrometry in the Art Field. Part 3: The Characterization of Some Non-proteinaceous Binders

Abstract

Curie-point pyrolysis/gas chromatography/mass spectrometry has been employed to characterize nine non-proteinaceous media used in the past as binders in works of art. Obtaining their fingerprints (achieved by both chromatographic patterns and mass spectral data of the individual components) is important in the context of the building of a complete database to be used in an analytical approach to the field of museum materials and restoration.

Ageing behaviour and analytical characterization of the Jatobá resin collected from Hymenaea stigonocarpa Mart.

“…Therefore, this last temperature was finally selected for carrying out the study on Jatobá resin. This is consistent with temperatures in the range 600-650 • C that have been used in other studies of organic compounds present in artworks, particularly diterpenoid resins [24,26,27,[29][30][31]]. …”

“…Analytical studies have been done which not only deal with the characterization of the resins but also with their photochemical or thermal degradation. They have been performed by means of gas chromatography-mass spectrometry (GC-MS) [15,[19][20][21][22][23], pyrolysis-GC-MS (Py-GC-MS) [24], thermally assisted hydrolysis and methylation-Py-GC-MS (THM-Py-GC-MS) [25][26][27][28][29] and online trimethylsilylation Py-GC-MS [17,[30][31][32].…”

Pyrolysis GC–MS and THM-GC–MS studies of a black coating from Little Lost River Cave, Idaho

“…Py-GC-MS is a powerful sample preparation, separation, and identification technique often utilized to characterize relatively high molecular weight materials like polymers. In archaeological and museum sciences, py-GC-MS has been used in the study of artists' materials [21][22][23][24][25][26], resinous materials [27][28][29][30], and black encrustations on or near cultural properties [18,31,32]. Of particular relevance to characterizing the 10BT1 coating, organic residues on pottery, including those formed during cooking, have been studied using py-GC-MS [33][34][35][36].…”

A pirólise como técnica analítica

“…[99][100][101][102][103][104] Destacam-se os trabalhos de Chiavari et al 105 e Chiavari et al 106 que estudaram oito tipos de resinas naturais (sandá-raca, Manila copal, colofônio, terebentina de Veneza, terebentina de Strasbourg, dammar, mastic e verniz) utilizando hexametildissilazano (HMDS) como agente derivatizante. A análise dos produtos de pirólise derivatizados revelou compostos característicos de cada tipo de resina, denominados de marcadores.…”