Microwave-Ultrasonic Synergistic Extraction of Crude Se-Polysaccharides from Se-Enriched Tea

Abstract:

Se-polysaccharides are organic Se-conjugated biological macromolecules with stronger biological activities than Se-free polysaccharides. Se-polysaccharides, as a kind of biological materials, can be extracted from Se-enriched tea and can increase the added value of tea production. Microwave–ultrasonic synergistic extraction exhibits the advantages of microwave and ultrasonic extraction and thus provides an economic and effective path for utilization of Se-polysaccharides. In this study, Se-polysaccharides were extracted from Se-enriched tea by microwave–ultrasonic synergistic method for the first time. The optimal condition was determined through single-factor experiment and L₉(4³) orthogonal experiment. Results showed that the optimal condition comprised the following: ratio of solvent to material of 20:1, microwave power of 250 W, extraction temperature of 60 °C, and extraction time of 210 s; under this condition, the extraction rate of Se-polysaccharides reached the maximum value of 4.56%. This study shows that microwave–ultrasonic synergistic extraction is an efficient technology for extracting Se- polysaccharides from Se-enriched tea.

• Periodical: Key Engineering Materials (Volume 737)
• Pages: 360-366
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.737.360
• Online since: June 2017
• Authors: Tao Wang, Wen Li, Tong Xiang Li*
• Keywords: Biological Materials, Microwave-Ultrasonic Synergistic Extraction, Orthogonal Test, Se-Enriched Tea, Selenium-Polysaccharides

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