Abstract
H2O2/UV Photo-Oxidation of Gadung (Dioscorea Hispida Dennst.) Starch and its Product Physicochemical Characterization
Andri Cahyo Kumoro*, Diah Susetyo Retnowati, Ratnawati Ratnawati and Catarina Sri Budiyati
DOI : http://dx.doi.org/10.13005/ojc/320425
Abstract:
This work aimed to study the preparation and physicochemical properties characterization of oxidized gadung starch obtained from oxidation process implementing combined H2O2-UV irradiation. The photo-oxidation process was carried out in a well-mixed slurry reaction system at ambient temperature. The extent of oxidation was determined based on the carboxyl and the carbonyl contents of the oxidized gadung starch. The results show that oxidation process altered the carbonyl and carboxyl contents of the starch. Except the morphology of the starch, the swelling power, solubility and gelatinization temperature of the starch were severely affected by H2O2/UV oxidation process.
Keywords:carbonyl; carboxyl; starch; oxidation; hydrogen peroxide; UV
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