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《J IND ENG CHEM》关于化妆品乳液中L-抗坏血酸的稳定化研究

更新日期:2017年11月14日

摘要

本文主要关于防止化妆品乳液中L-抗坏血酸(又称为维生素C)氧化的研究。首先,我们通过测定其稳定性来确定最佳比例,我们还研究了乳液中L-抗坏血酸的PH,颜色以及浓度变化的影响。我们通过用HPLC(高效液相色谱仪)来研究L-抗坏血酸在乳液中的动力学。结果表明,在分散体系中含有甘油比含有丙二醇、丁二醇或去离子水更有效来维持初始L-抗坏血酸含量。此外,零级反应模型最适合油包丁二醇乳液体系,而一级反应模型最适合油包水型乳液体系。

 



(原文)

Stabilization of L-ascorbic acid in cosmetic emulsions

 

ABSTRACT

  The prevention of the oxidation of L-ascorbic acid in cosmetic emulsions was investigated. First, its stability was tested to determine the optimum ratio, and the effects of changes in the pH, color, and concentration of L-ascorbic acid in the emulsions were investigated. The kinetics of L-ascorbic acid in emulsions were studied through HPLC. The inclusion of glycerine in the dispersion was more effective in maintaining the initial L-ascorbic acid content than the inclusion of propylene glycol, butylene glycol or DI water. A zero-order reaction model best fitted the butylene glycol-in-oil emulsion, whereas a first-order model best fitted the water-in-oil emulsion.


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