共 23 条
Analytical pyrolysis of carbohydrates in the presence of hexamethyldisilazane
被引:80
作者:
Fabbri, D
[1
]
Chiavari, G
[1
]
机构:
[1] Univ Bologna, Lab Chim Ambientale, ITIS, I-48100 Ravenna, Italy
关键词:
pyrolysis;
gas chromatography/mass spectrometry;
carbohydrates;
trimethylsilylation;
D O I:
10.1016/S0003-2670(01)01359-9
中图分类号:
O65 [分析化学];
学科分类号:
070302 ;
081704 ;
摘要:
The paper describes gas chromatography/mass spectrometry (GC/MS) analysis of the products released from carbohydrates when flash pyrolysed in the presence of hexamethyldisilazane (HMDS). Monosaccharides (D-glucose, D-mannose, D-galactose) and polysaccharides (cellulose, laminaran, agar) were pyrolysed with HMDS using an off-line apparatus and on-line Py-GUMS. A series of characteristic trimethylsilyl (TMS) ethers of hydroxylated compounds were released which are proposed as useful markers for the recognition of carbohydrates in complex matrices. The detected products included TMS derivatives of anhydrosugars, hydroxylated pyranones and cyclopentenones, hydroxymethylfuraldehyde, hydroxymethylfurane, di- and tri-hydroxybenzenes. Monosaccharides and related polymers yielded the TMS ethers of the corresponding 1,6-anhydro-D-hexopyranoses and 1,6-anhydro-D-hexofuranoses which were identified by off-line pyrolysis of the parent carbohydrate followed by silylation with HMDS. (C) 2001 Elsevier Science B.V. All rights reserved.
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页码:271 / 280
页数:10
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