多孔淀粉对茶多酚的吸附性能及其复合物抗氧化能力的研究

doi:10.13305/j.cnki.jts.2015.05.011

Abstract

Abstract: Porous cornstarch was prepared by synergism of the α-amylase and gluamaylase and employed as a carrier to absorb tea polyphenol(TP), the factors affecting the adsorption were optimized by using the orthogonal experimental design. Studying on the adsorption thermodynamic characteristic and fitting the isotherms with Langmuir equation and Freundlich equation, it turned out that the adsorption isotherm was well represented by the Langmuir equation (R²>0.99). The different heat of adsorption according to the Langmuir adsorption isotherm conformed to the hydrogen bonding key range. Furthermore, the investigation on the antioxidative activity of the complex by measuring the scavenging capabilities on DPPH and ABTS free radicals showed that the complex possessed a good antioxidant activity rised with the concentration of TP, and the auto-oxidation rates of TP turned to a significant slower rate after TP was adsorbed on the porous starch.

Key words: porous starch, tea polyphenols, adsorption, antioxidant

CLC Number:

LUO Huimin, NING Min, XU Yingbo, WANG Chenghui, DU Xianfeng. Adsorption Properties of Porous Starch on Tea Polyphenols and Antioxidative Capacity of the Complex[J]. Journal of Tea Science, 2015, 35(5): 473-480.

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Adsorption Properties of Porous Starch on Tea Polyphenols and Antioxidative Capacity of the Complex

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