Identification of O-α-d-galactopyranosylsaccharinic acids as their trimethylsilyl derivatives by mass spectrometry

✍ Scribed by Klaus Niemelä

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 715 KB
• Volume: 194
• Category: Article
• ISSN: 0008-6215
• DOI: 10.1016/0008-6215(89)85004-9

✦ Synopsis

Kraft pulping of pine wood and treatment of guaran with alkali gave several O-cy-D-galactopyranosylsaccharinic acids or related compounds, which were analysed by capillary g.l.c.-m.s. Of these compounds, twelve were identified and eight were new. The degradation of galactomannans by alkali is discussed.

EXPERIMENTAL Kraft pulping of pine wood. -Two samples of black liquor from kraft pulping of industrial pine wood chips were investigated. Conventional black liquor was obtained as described8. The charge of active alkali (as NaOH) was 22%, the sulfidity [lo0 X Na,S/(NaOH + Na,S)] was 30%, and the 1iquor:wood ratio was 4 L kg-'. The time to maximum temperature (20+170") was 95 min and the time at 170" was 70 min. The yield of pulp was 47.5%.