Study on the Extraction and Stability of Porphyra haitanensis Polyphenols
In this study,on one hand,with the optimization regarding the extraction of polyphenols from the low value Porphyra haitanensis,the preservation stability of polyphenol extracts was studied.On the other hand,single factor and orthogonal experiments were conducted to evaluate the influence of the four main factors,including ethanol concentration,solvent-to-material ratio,extraction temperature and ultra-sonic extraction time.On this basis,the effects of storage temperature,pH and light on the stability of polyphenols from P.haitanensis were studied.Generally speaking,the results showed that the optimal ex-traction process of polyphenols from P.haitanensis was 70％ethanol concentration,30:1(mL:g)sol-vent-to-material ratio,40 min extraction time and 50 ℃ extraction temperature.What's more,the re-sults of stability suggested that the polyphenols of P.haitanensis should be stored under low-temperature,dark,and acidic conditions.
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