Title: Determination of the xanthate group distribution on viscose by liquid-state 1H NMR spectroscopy
Language: English
Authors: Schwaighofer, Andreas  
Zuckerstätter, Gerhard 
Schlagnitweit, Judith 
Sixta, Herbert 
Müller, Norbert 
Category: Original Research Article
Issue Date: 2011
Journal: Analytical Bioanalytical Chemistry
ISSN: 1618-2650
An analytical method for determination of the xanthate group distribution on viscoses based on liquidstate NMR spectroscopy was developed. Sample preparation involves stabilization of the xanthate group by allylation followed by derivatization of the remaining free hydroxyl groups at the glucose unit. The method was applied for studying (1) the γ-value (number of xanthate groups per 100 glucose units) of viscose, (2) the distribution of the xanthate groups on the anhydroglucose unit (AGU), and (3) changes of the xanthate group distribution during ripening. Results of the γ-value determination are well comparable with reference methods. Elucidation of the xanthate group distribution on the AGU gives the percentage at the C-6 position and a cumulative share of the positions C-2 and C-3. During ripening, xanthate groups at C-2 and C-3 degrade first, while xanthates at C-6 decompose at a slower rate.
Keywords: 1H NMR; Viscose; Xanthate group distribution; Gamma value
DOI: 10.1007/s00216-010-4570-2
Library ID: AC15518669
URN: urn:nbn:at:at-ubtuw:3-7473
Organisation: E164 - Institut für Chemische Technologien und Analytik 
Publication Type: Article
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