Abstract:Glucoside has a good effect, cheap sources is broad, is an ideal natural coloring agent.In this paper, using different concentrations of ethanol concentration of ultrasonic extraction, extraction with absorbance to evaluate the amount of content.In the extraction process in a single experiment factors, by changing the ethanol concentration, extraction temperature, extraction time and extraction of the solid-liquid ratio assessment of extraction efficiency, obtained through the best combination of orthogonal test verification.Through experiments that the optimal extraction conditions were: 80% ethanol --- HCl, R = 1:12, T = 50 ℃, t = 40min.With pyrogallol solution, Fenton reagent, DPPH to measure the antioxidant capacity of grape glucosides.By changing the concentration of the sample to derive clearance rate, removal efficiency obtained by the experimental results have been more than 50%.
Keywords:Glucoside Purification Pyrogallol Fenton DPPH
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