Desorption of vitamin E from silica-packed fixed-bed column by isopropanol

Boon Seang Chu*, Siew Young Quek, Badlishah Sham Baharin, Yaakob Bin Che Man

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Desorption of vitamin E from silica-packed fixed-bed column was studied as functions of column bed height, column temperature and flow rate of isopropanol. Isopropanol was the desorbing solvent and it was eluted through the columns saturated with vitamin E. The desorption profiles of all systems showed that vitamin E might desorb at two distinct rates simultaneously. The slow desorbing step was the rate-controlling process for recovery of vitamin E. The desorption rate increased with the decrease of column bed height and flow rate, but increased with increasing column temperature. This indicated that the desorption process was an endothermic process. The percentage recovery of vitamin E upon completion of desorption was considered high for all systems, ranging from 94.8 to 98.8%, with vitamin E concentration in the extract of 18.5-21.5%. Although the bed height, column temperature and flow rate were functions of desorption rate, it appeared that percentage recovery and vitamin E concentration in the extract were rather unaffected by the operating conditions tested if the column was eluted by isopropanol for a sufficient time to desorb vitamin E. Nevertheless, the use of isopropanol would be more efficient if desorption was carried out at lower flow rate and higher column temperature.

Original languageEnglish
Article number4
JournalInternational Journal of Food Engineering
Volume6
Issue number5
Early online date24 Sep 2010
DOIs
Publication statusPublished - 14 Oct 2010
Externally publishedYes

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