Separation and concentration of baicalin from Scutellaria Baicalensis Georgi extract by aqueous two-phase flotation

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• 作者：Peng-yu Bi ; Lin Chang ; Ying-lin Mu ; Jian-you Liu ; Yu Wu ; Xue Geng ; Yun Wei
• 关键词：Aqueous two-phase flotation ; Baicalin ; Scutellaria Baicalensis Georgi ; Aqueous two-phase extraction ; Solvent sublation
• 刊名：Separation and Purification Technology
• 出版年：2013
• 出版时间：15 September, 2013
• 年：2013
• 卷：116
• 期：Complete
• 页码：454-457
• 全文大小：422 K

文摘

An effective and environment-friendly method for separating and concentrating baicalin from Scutellaria Baicalensis Georgi (SBG) extract by aqueous two-phase flotation (ATPF) was established. Using an aqueous two-phase system of polyethylene glycol (PEG)/ammonium sulfate, the effects of varying solution pH, (NH₄)₂SO₄ concentration in aqueous solution, PEG molecular weight, nitrogen flow rate, flotation time and initial volume of PEG phase were investigated in detail. Under the optimal conditions for ATPF, the established method was successfully applied to the real sample, and the separation efficiency was more than 90 % , and the concentration coefficient was more than 27. Compared with solvent sublation (SS), liquid-liquid extraction (LLE) and aqueous two-phase extraction (ATPE), ATPF showed advantages of good separation efficiency, high concentration coefficient and low consumption of organic solvent. All experimental results indicate that ATPF is an effective pretreatment technique for the instrumental purification of baicalin from SBG.