Characterization of melanins by pyrolysis/gas chromatography/mass spectrometry
| Autor: | Gábor Czira, György Vas, Károly Vékey, József Tamás, Carlo Virgilio Luigi Costa, Graziella Allegri, Piero Traldi, Donata Favretto, Antonella Bertazzo |
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| Rok vydání: | 1993 |
| Předmět: |
integumentary system
Chemistry Organic Chemistry Inorganic chemistry Analytical chemistry chemistry.chemical_element Mass spectrometry Oxygen Nitrogen Analytical Chemistry Characterization (materials science) Pyrolysis–gas chromatography–mass spectrometry Gas chromatography Joule heating Pyrolysis Spectroscopy |
| Zdroj: | Rapid Communications in Mass Spectrometry. 7:870-873 |
| ISSN: | 1097-0231 0951-4198 |
| DOI: | 10.1002/rcm.1290071003 |
| Popis: | Various natural and synthetic melanins were studied by the pyrolysis/gas chromatography/mass spectrometry technique, using both resistive and Curie-point heating. The results obtained by the two pyrolysis procedures are different and complementary. By means of Curie-point pyrolysis, at long times and high temperatures low molecular weight gases are produced from various melanins; the yields of the common pyrolysis products are also dependent on the melanin under study. By resistive heating, higher molecular weight compounds are produced, mainly nitrogen and oxygen heterocyclic systems, and differences are still evident among the products from the different melanins. |
| Databáze: | OpenAIRE |
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