食品科学

• 成分分析 • 上一篇    下一篇

槲皮素及其乙酸乙酯衍生物的平衡溶解度和油水分配系数的测定

何 翊,秦 燕,范亚苇,邓泽元,胡蒋宁*   

  1. 南昌大学 食品科学与技术国家重点实验室,江西 南昌 330047
  • 出版日期:2015-07-25 发布日期:2015-07-15
  • 通讯作者: 胡蒋宁
  • 基金资助:

    国家自然科学基金地区科学基金项目(31360370);2014年江西省科学技术研究项目(GJJ14092)

Determination of Equilibrium Solubility and Apparent Oil/Water Partition Coefficients of Quercetin and Its Ethyl Acetate Derivatives

HE Yi, QIN Yan, FAN Yawei, DENG Zeyuan, HU Jiangning*   

  1. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
  • Online:2015-07-25 Published:2015-07-15
  • Contact: HU Jiangning

摘要:

通过测定槲皮素及其酯化物的平衡溶解度和油水分配系数,检测酯化后的槲皮素衍生物脂溶性是否提高。采用高效液相色谱法测定槲皮素及3,7,3’,4’-O-四乙酸乙酯槲皮素在水、不同缓冲盐溶液中的质量浓度;采用摇瓶-液相色谱法,测定二者在正辛醇-水、缓冲液体系中的油水分配系数。37 ℃时,槲皮素在水中的平衡溶解度为23.02 μg/mL,而3,7,3’,4’-O-四乙酸乙酯槲皮素在水中的平衡溶解度更小,为10.23 μg/mL。随着溶剂pH值的增大,槲皮素的平衡溶解度增大,3,7,3’,4’-O-四乙酸乙酯槲皮素变化并不显著。槲皮素、3,7,3’,4’-O-四乙酸乙酯槲皮素在正辛醇-水体系条件下的油水分配系数分别为1.819、3.696。酯化修饰后的3,7,3’,4’-O-四乙酸乙酯槲皮素脂溶性高于槲皮素。

关键词: 槲皮素, 3, 7, 3&rsquo, 4&rsquo, -O-四乙酸乙酯槲皮素, 平衡溶解度, 油水分配系数

Abstract:

This study aimed to determine the equilibrium solubility and oil/water partition coefficients of quercetin and its
ester derivative. The equilibrium solutions of quercetin and its ethyl acetate derivative in various media were detected by
high performance liquid chromatogram (HPLC); and the shake flask-HPLC method was applied to determine the partition
coefficients of quercetin and its ethyl acetate derivative in n-octanol-water-buffer solutions of different pH values. The
equilibrium solubility of querctin and its ethyl acetate derivative was 23.02 and 10.23 μg/mL in water at 37 ℃, and the
equilibrium solubility of querctin increased with increasing pH of the buffer solution, but no remarkable change was
observed for its ethyl acetate derivative. The partition coefficients of quercetin and its ethyl acetate derivative in n-octanolwater-
buffer solutions of different pH were 1.819 and 3.696, respectively. The esterification modification of quercetin
improved its lipid solubility.

Key words: querctin, ethyl acetate derivative of quercetin, equilibrium solubility, apparent oil/water partition coefficient

中图分类号: