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用丙酮在不同浓度、不同时间内从葡萄籽中提取单宁,用正丁醇盐酸法测定单宁含量。通过比较得到最佳提取工艺条件为10∶7丙酮-水体系以16∶1的液料比进行抽提,时间为12 h,提取温度为45℃,单宁提取率可达到0.95%。
Tannins were extracted from grape seeds with acetone at different concentrations and different times, and the content of tannin was determined by n-butanol hydrochloride method. By comparing the optimal extraction conditions, the extraction rate of tannin was up to 0.95% at 10: 7 acetone-water system at a liquid-to-liquid ratio of 16:1. The extraction time was 12 h and the extraction temperature was 45 ℃.