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Citation: LI Xiaohui, CHEN Hongmei, ZHOU Xiaohua, SU Yu, WANG Yonghong. Extraction of L-Synephrine by Bis(2-ethylhexyl) phosphoric acid/n-octanol Reversed Micelle[J]. Chinese Journal of Applied Chemistry, ;2011, 28(11): 1311-1316. doi: 10.3724/SP.J.1095.2011.00685 shu

Extraction of L-Synephrine by Bis(2-ethylhexyl) phosphoric acid/n-octanol Reversed Micelle

1.
College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030

Corresponding author: ZHOU Xiaohua,
Received Date: 18 November 2010
Available Online: 15 April 2011
Fund Project: 中央高校基本科研业务费资助项目(CDJXS10221138,CDJXS11221170) (CDJXS10221138,CDJXS11221170)

Bis(2-ethylhexyl) phosphoric acid(P₂₀₄)/n-octanol reversed micelle system was prepared to extract L-synephrine in Citrus aurantium fruit crude extract. The extraction mechanism as well as influencing factors including the pH of the aqueous phase, water content(W₀), surfactant concentration, and extraction time were studied. P 204/octanol reversed micelles was observed by AFM. The optimal extraction conditions determined via a series of experiments are as follows:aqueous phase pH=6.5, water content(W₀)=15, surfactant concentration=0.08 mol/L, and extraction time=15 min. Under the optimized conditions, the one-time L-synephrine extraction rate reaches 68.0%. The mathematical model to fit the relationships of Lsynephrine extraction rate with aqueous phase pH and surfactant concentration is also discussed.
- L-synephrine,
- bis(ethylhexyl) phosphoric acid,
- reversed micelle,
- extraction
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