Investigation of a coating system for microencapsulation of iodine.

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Investigation of a coating system for microen ...
Eilyn Rodriguez
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December 15, 2009 | History

Investigation of a coating system for microencapsulation of iodine.

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Potassium iodate premixes encapsulated with these coatings (15% encapsulation level) were added to non-iodized salt samples and exposed to much more severe conditions (0.1% w/w ferrous sulphate and 60%RH at 40°C). All the iodine initially contained in the samples was lost in eight weeks. Process control and difficulties experienced with the equipment available did not allow continuous film formation, which influenced the results.The effectiveness of enteric coatings in stabilizing microencapsulated iodine was investigated. Eudragit NE 30D, Eudragit RS 30D, Eudragit S100, HPMCAS, and ethylcellulose coatings (5--15% particle mass encapsulation level) on potassium iodate premixes were identified as the most stable formulations based on iodine retention tested in double fortified salt samples with soy stearine-encapsulated iron premixes stored at different conditions (60% RH at 40°C, and room temperature conditions: 25°C and 35% RH) for 3 months.The use of these polymeric coatings increased the particle density of the premixes by 25%--60% compared to soy stearine encapsulated iodine, eliminating the potential problem of losing floating premix particles during food preparation. Further investigation of alternative film formers was recommended along with optimization of coating techniques, conditions and formulations.

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Language
English
Pages
95

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Cover of: Investigation of a coating system for microencapsulation of iodine.
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Edition Notes

Source: Masters Abstracts International, Volume: 44-01, page: 0438.

Thesis (M.A.Sc.)--University of Toronto, 2005.

Electronic version licensed for access by U. of T. users.

ROBARTS MICROTEXT copy on microfiche.

The Physical Object

Pagination
95 leaves.
Number of pages
95

ID Numbers

Open Library
OL19214606M
ISBN 10
0494021535

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December 15, 2009 Edited by WorkBot link works
October 21, 2008 Created by ImportBot Imported from University of Toronto MARC record.