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研究了以水提酸沉法提取黄芩中黄芩苷的最佳提取工艺。考察了水的用量、提取温度、提取时间、酸沉等多种因素对黄芩苷收率的影响。实验结果表明,提取黄芩苷的最佳工艺条件为:水提取两次,两次液固比分别为10和5,时间分别为60 min和30 min,双层滤布过滤再离心分离,80℃加酸并保温60 min,酸沉静置3.0 h。在此条件下,黄芩苷收率可达11.85%。
The optimal extraction technology of baicalin from Scutellaria baicalensis Georgi by water extraction and acid precipitation was studied. The effects of water dosage, extraction temperature, extraction time, acid precipitation and other factors on the yield of baicalin were investigated. The experimental results showed that the optimum conditions for the extraction of baicalin were: water extraction twice, twice liquid-solid ratio of 10 and 5, respectively, for 60 min and 30 min, double-layer filter cloth and centrifuged again, Add acid and heat 60 min, acid precipitation set 3.0 h. Under this condition, the yield of baicalin can reach 11.85%.