METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟基用缩酮保护,再用正己重结晶分离纯化。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

用正己液体饮料中防腐剂，使液经环糊精交联树脂分离后，用乙醇溶液洗脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟基用缩酮保护,再用正重结晶分离纯化。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

用正萃取体饮料中的防腐剂，使萃取经环糊精交联树脂分离后，用乙洗脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟基用缩酮保护,再用正己烷重结晶分离纯化。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

用正己烷萃饮料中防腐剂，使萃经环糊精交联树脂分离后，用乙醇溶洗脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟缩酮保,正己烷重结晶分离纯化。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

正己烷萃取液体饮料中的防腐剂，使萃取液经环糊精交联树脂分离后，乙醇溶液洗脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟基用缩酮保护,再用正己烷重结晶分离纯化。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

用正己烷萃取液中的防腐剂，使萃取液经环糊精交联树脂分离后，用乙醇液洗脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟基用缩酮保护,再用正己烷重结纯化。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

用正己烷萃取液体饮料中的防腐剂，使萃取液经环糊交联树脂后，用乙醇溶液洗脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟基用缩酮,用正己烷重结晶分离纯化。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

用正己烷萃取体饮料中的防腐剂，使萃取经环糊精交联树脂分离后，用乙醇溶洗脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

法羟基用缩酮保护,再用正己烷重结晶分离纯化。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

用正己烷萃取液体饮料中的防腐剂，使萃取液经环糊精交联树脂分离后，用乙醇溶液洗脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟用缩酮保护,再用正己重结晶分离纯化。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

用正己萃取液体饮料中的，使萃取液经环糊精交联树脂分离后，用乙醇溶液洗脱。