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
离后，用乙
溶液洗脱。
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离后，用乙溶液洗脱。
：
上例句、词性
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