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
，用乙
溶液
。
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，用乙溶液。
明：以上例句、词性
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