✦ LIBER ✦

Matrix-assisted Laser Desorption/Ionization Mass Spectrometry of Natural and Synthetic Lignin

✍ Scribed by Paola Bocchini; Guido C. Galletti; R. Seraglia; P. Traldi; S. Camarero; A. T. Martinez

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 375 KB
Volume: 10
Category: Article
ISSN: 0951-4198
DOI: 10.1002/(sici)1097-0231(19960715)10:9<1144::aid-rcm614>3.0.co;2-3

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✦ Synopsis

Lignin is one of the components, with cellulose and hemicellulose, of cell walls in all terrestrial plants. Lignin is an amorphous, three-dimensional, polyphenolic molecule charged with the function of giving strength and impermeability to the plant structure. The determination of its molecular weight and structure is still problematic owing to the difficulties in isolation of lignin from the other cell wall constituents. The present work reports the experimental conditions for matrix-assisted laser desorptionlionization time-of-iiight mass spectrometry for the characterization of different types of natural lignins and of one synthetic lignin. A nitrogen laser (A=337 nm) was used for ion desorption and sinapinic acid (3,5-dimethoxy-4-hydroxycinnamic acid) was chosen as the best matrix for lignin analysis. Data on the molecular weight distribution of oligomers in lignin and information on the monomeric constituents of different types of lignin are shown.

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