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Reduction of Phytic Acid in Soymilk by Immobilized Phytase System
Author(s) -
Chen Kuan I,
Chiang Cheng Yen,
Ko Chih Yuan,
Huang Hui Yu,
Cheng Kuan Chen
Publication year - 2018
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/1750-3841.14394
Subject(s) - phytase , phytic acid , food science , chemistry , reduction (mathematics) , biochemistry , enzyme , mathematics , geometry
In this study, three carriers (glass microsphere, cellulose beads and AlgNa/PVA beads) were evaluated as phytase solid carriers for reduction of phytic acid within soymilk. Phytase was covalently immobilized onto or entrapped within carriers for repeated use. Glass microsphere was chosen due to its high catalytic efficiency. Optimal operating condition (pH 6.0, 60 °C) was determined using 4‐Nitrophenyl phosphate disodium salt hexahydrate as an indicator. Operational reusability was confirmed for more than seven batch reactions and the storage stability was capable of sustaining 70% of its catalytic activity for 40 days. The kinetic parameters including rate constant ( K ), time (τ 50 ) in which 50% of phytic acid hydrolysis was reached, and time (τ complete ) required to achieve complete phytic acid hydrolysis, were 0.023 min −1 , 35.7 min, 110 min. The current procedure provides a cheap as well as an easy way to carry out the reduction of phytic acid in soymilk, which has great potential in practical application.