| 聚乙二醇/盐双水相萃取L-苯丙氨酸的研究 |
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| 引用本文： | 孙晨,刘文举,刘宁宁.聚乙二醇/盐双水相萃取L-苯丙氨酸的研究[J].食品工业科技,2012,33(6):324-326,331. |
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| 作者姓名： | 孙晨 刘文举 刘宁宁 |
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| 作者单位： | 河南工业大学化学与4L_r_学院,河南郑州,450001 |
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| 基金项目： | 校引进人才专项基金(2009BS002) |
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| 摘 要： | 研究了聚乙二醇/盐双水相体系的成相行为及L-苯丙氨酸在双水相中的分配规律,其中包括聚乙二醇的分子量、聚乙二醇质量分数、盐的种类及加入量、L-苯丙氨酸初始浓度和pH对萃取分离的影响。当聚乙二醇1000的质量分数为27%,磷酸氢二钾的质量浓度为0.15g/mL,L-苯丙氨酸的质量浓度为10g/L,体系的pH为8.5时,L-苯丙氨酸的萃取率最高为99.5%,分配系数最大为186.5。
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| 关 键 词： | 双水相萃取 聚乙二醇 L-苯丙氨酸 |
Study on aqueous two-phase extraction of L-phenylalanine by polyethylene glycol/salt system |
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| Affiliation: | SUN Chen,LIU Wen - ju,LIU Ning - ning (Chemistry and Chemical Engineering College of Henan University of Technology,Zhengzhou 450001,China) |
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| Abstract: | An aqueous two - phase system of polyethylene glycol(PEG)/salt with the behavior of forming aqueous two - phase and the distribution rules of L - phenylalanine in the aqueous two - phase system were studied. Effects of the molecular weight of polyethylene glycol,the mass fraction of polyethylene glycol,the types and concentrations of salts,the initial concentration of L - phenylalanine and pH value were investigated. When the mass fraction of PEG1000 was 27%,the mass concentration of K2HPO4 was 0. 15g/mL,the initial concentration of L - phenylalanine was 10g/L and pH value was about 8. 5,the highest extraction yield of L - phenylalanine could reach 99. 5%,partition coefficient of L - phenylalanine could reach 186. 5. |
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| Keywords: | aqueous two - phase extraction polyethylene glycol L - phenylalanine |
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