Desorption of vitamin E from silica-packed fixed-bed column by isopropanol.
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 sho...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English English |
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Walter de Gruyter
2010
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| Online Access: | http://psasir.upm.edu.my/id/eprint/13921/1/Desorption%20of%20vitamin%20E%20from%20silica.pdf |
| _version_ | 1825945329163304960 |
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| author | Chu, Boon Seang Quek, Siew Young Baharin, Badlishah Sham Che Man, Yaakob |
| author_facet | Chu, Boon Seang Quek, Siew Young Baharin, Badlishah Sham Che Man, Yaakob |
| author_sort | Chu, Boon Seang |
| collection | UPM |
| description | 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. |
| first_indexed | 2024-03-06T07:29:48Z |
| format | Article |
| id | upm.eprints-13921 |
| institution | Universiti Putra Malaysia |
| language | English English |
| last_indexed | 2024-03-06T07:29:48Z |
| publishDate | 2010 |
| publisher | Walter de Gruyter |
| record_format | dspace |
| spelling | upm.eprints-139212015-11-03T01:23:37Z http://psasir.upm.edu.my/id/eprint/13921/ Desorption of vitamin E from silica-packed fixed-bed column by isopropanol. Chu, Boon Seang Quek, Siew Young Baharin, Badlishah Sham Che Man, Yaakob 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. Walter de Gruyter 2010 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/13921/1/Desorption%20of%20vitamin%20E%20from%20silica.pdf Chu, Boon Seang and Quek, Siew Young and Baharin, Badlishah Sham and Che Man, Yaakob (2010) Desorption of vitamin E from silica-packed fixed-bed column by isopropanol. International Journal of Food Engineering, 6 (5). pp. 1556-3758. ISSN 1556-3758 10.2202/1556-3758.1767 English |
| spellingShingle | Chu, Boon Seang Quek, Siew Young Baharin, Badlishah Sham Che Man, Yaakob Desorption of vitamin E from silica-packed fixed-bed column by isopropanol. |
| title | Desorption of vitamin E from silica-packed fixed-bed column by isopropanol. |
| title_full | Desorption of vitamin E from silica-packed fixed-bed column by isopropanol. |
| title_fullStr | Desorption of vitamin E from silica-packed fixed-bed column by isopropanol. |
| title_full_unstemmed | Desorption of vitamin E from silica-packed fixed-bed column by isopropanol. |
| title_short | Desorption of vitamin E from silica-packed fixed-bed column by isopropanol. |
| title_sort | desorption of vitamin e from silica packed fixed bed column by isopropanol |
| url | http://psasir.upm.edu.my/id/eprint/13921/1/Desorption%20of%20vitamin%20E%20from%20silica.pdf |
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