食品科学 ›› 2007, Vol. 28 ›› Issue (3): 64-67.

• 基础研究 • 上一篇    下一篇

VC硬脂酸酯和异VC硬脂酸酯乙醇溶液的稳定性研究

 郑大贵, 肖竹平, 叶红德   

  1. 上饶师范学院化学系; 上饶师范学院化学系 江西上饶334001; 江西上饶334001;
  • 出版日期:2007-03-15 发布日期:2011-12-31

Study on Stability of L-ascorbyl Stearate and D-isoascorbyl Stearate in Ethanol

 ZHENG  Da-Gui, XIAO  Zhu-Ping, YE  Hong-De   

  1. Department of Chemistry, Shangrao Normal College, Shangrao 334001, China
  • Online:2007-03-15 Published:2011-12-31

摘要: 将VC硬脂酸酯和异VC硬脂酸酯溶解到乙醇中,利用碘量法测定不同时间、不同条件下它们的浓度。通过比较残留率,考察了光照、温度、金属离子、金属离子络合剂和蔗糖等因素对他们稳定性的影响。实验所表现出的总体规律是:在相同条件下,VC硬脂酸酯比异VC硬脂酸酯更稳定。

关键词: VC硬脂酸酯, 异VC硬脂酸酯, 稳定性

Abstract: The remaining ratio of L-ascorbyl stearate or D-isoascorbyl stearate in ethanol is measured by iodimetry to investigate their stability. The stability of L-ascorbyl stearate or D-isoascorbyl stearate in ethanol decreases when the solution is exposed to light or contained metal ion. The L-ascorbyl stearate and D-isoascorbyl stearate become more and more unstable as the solution temperature increases. Metal ion chelating agent EDTA and cane sugar can also affect their stability. In generally, L- ascorbyl stearate is more stable than D-isoascorbyl stearate under the same circumstances.

Key words: L-ascorbyl stearate, D-isoascorbyl stearate, stability