Gas Chromatography-Mass Spectrometry

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Elsa Lundanes - One of the best experts on this subject based on the ideXlab platform.

Maria Perla Colombini - One of the best experts on this subject based on the ideXlab platform.

  • Gas chromatography mass Spectrometry and pyrolysis Gas chromatography mass Spectrometry for the chemical characterisation of modern and archaeological figs ficus carica
    Journal of Chromatography A, 2011
    Co-Authors: Erika Ribechini, Josefina Perezarantegui, Maria Perla Colombini
    Abstract:

    Gas chromatography/mass Spectrometry (GC/MS) after alkaline hydrolysis, solvent extraction and trimethylsilylation, and analytical pyrolysis using hexamethyldisilazane (HMDS) for in situ derivatisation followed by Gas chromatographic/mass spectrometric analysis (Pyrolysis-silylation-GC/MS) were used to investigate the hydrolysable and soluble constituents, and the polymerised macromolecules of an archaeological fig (Ficus carica) recovered in Zaragoza (Spain), as well as of modern figs. The main aim was to study the compositional alterations undergone by the fig tissues in a particular archaeological environment: the fig was in a vessel and covered by a layer of a mixture of orpiment and gypsum. A comparison between the GC/MS results from modern and archaeological figs revealed that degradative reactions took place, leading to the disappearance/depletion of reactive (unsaturated fatty acids) and sensitive compounds (phytosterols and triterpenes). Py-silylation-GC/MS data provided evidence of a significant degradation of the saccharide and lipid components of the fig tissue, which left a residue enriched in polyphenols and polyesters.

  • characterisation of beeswax in works of art by Gas chromatography mass Spectrometry and pyrolysis Gas chromatography mass Spectrometry procedures
    Journal of Chromatography A, 2004
    Co-Authors: Ilaria Bonaduce, Maria Perla Colombini
    Abstract:

    Pyrolysis (Py) with in situ derivatisation with hexamethyldisilazane-Gas chroma-break tography-mass Spectrometry (GC-MS) and a Gas Chromatography-Mass Spectrometry procedure based on microwave-assisted saponification were used to identify the organic components in small sized beeswax samples. With the latter procedure quantitative recoveries can be made and hydrocarbons, alcohols and omega-1-diols in the neutral fraction, and fatty acids and omega-1-hydroxy acids in the acidic fraction can be efficiently separated and detected. Both procedures were used to characterise a wax anatomic sculpture "The Plague" (1691-1694) by Gaetano Zumbo, resulting in the identification of beeswax and a Pinaceae resin. The GC-MS analysis brought to light some essential differences in beeswax composition between the raw material and the old modelled wax thus giving some clear indications about the recipe used by the sculptor.

Bent Tore Roen - One of the best experts on this subject based on the ideXlab platform.

Erik Unneberg - One of the best experts on this subject based on the ideXlab platform.

John Aa Tornes - One of the best experts on this subject based on the ideXlab platform.

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