Abstract
By the Soxhlet extraction, ethanol is used as extraction solvent of lees to determinate the total phenol content of Xiaoqu spirits lees. Folin-phenol method is handled to extract and to determine the reducing ability of extraction. The total phenolic content in the most suitable condition is determinated by the Folin-phenol method and the optimum extraction technological condition of total phenol is determinated by the experiment. The experimental results show that the optimization conditions of the determination methods of total phenolic content are determined by 3.5 mL for the Folin phenol reagent, 1:1 for the 10% Na2CO3 ratio and 30 min for the chromogenic reaction at room temperature. The optimum extraction technological condition of total phenol from lees is as following: solid-liquid ratio 1:12, ethanol concentration 100%, extraction temperature 80℃, extraction time 10 h.
Highlights
Antioxidants are a material that can delay or prevent the oxidation of the substrate at low concentrations and are widely used in food, medicine, cosmetics and other fields [1] [2]
Experimental Materials Ditty lees were provided by Tanks Wine Co. in Sichuan
Extraction of Antioxidant Total Phenol from Lees of Xiaoqu Spirits (Soxhlet Extraction) Putting the lees into blast drying oven at 85 ̊C for 2 h, weighing 16 g dried raw material in the distillers and Soxhlet extraction tube, connecting the test device, adding 160 mL of ethanol to a round bottom flask of the Soxhlet extracted tube, the temperature magnetic heating stirrer was used to hear it, maintaining 80 ̊C ~ 85 ̊C and refluxing fir 8 h, till extract was cooled to room temperature, and voluming to 250 mL with boiled distilled water to become the sample solution
Summary
Antioxidants are a material that can delay or prevent the oxidation of the substrate at low concentrations and are widely used in food, medicine, cosmetics and other fields [1] [2]. People have used the synthetic antioxidants in order to preserve and prevent oxidation. The small liquor distiller’s grains were used as raw material in this experiment to extract the natural antioxidants total phenolic, and measure its reducing ability. (2015) Extraction of Antioxidant Total Phenol from Lees of Xiaoqu Spirits.
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