Analytical pyrolysis of carbohydrates: I. Chemical interpretation of matrix influences on pyrolysis-mass spectra of amylose using pyrolysis-gas chromatography-mass spectrometry |
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| Authors: | Arie van Der Kaaden Johan Haverkamp Jaap J Boon Jan W De Leeuw |
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| Institution: | FOM-Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam The Netherlands;School of Pharmacy, University of California, San Francisco CA 941143 U.S.A.;Delft University of Technology, Department of Chemistry, Organic Geochemistry Unit, Delft The Netherlands |
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| Abstract: | Inorganic additives, viz. Na2CO3, NaOH, HCl, ZnC2, NaH2PO4, Na2HPO4, NaCl. MgSO4 and sea salt, to the pyrolysis matrix change the pyrolysis-mass spectrum of amylose significantly. Carbonyl compounds, acids and their lactones, furans, pyranones anhydrosugars and aromatic substances are found in different ratios under the various conditions, as determined by pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS).Carbonyl compounds, acids and lactones are released from alkaline and neutral matrices. Furans and anhydrohexoses are particularly formed under neutral and acidic conditions. Pyranones are specific for phosphate matrices. Unsaturated hydrocarbons and aromatic substances arise from strongly alkaline or dehydrating matrices. Degradation pathways are proposed for various compound categories.The results of pyrolysis-mass spectrometry and Py-GC-MS are highly compatible. |
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