紫苏叶花色苷稳定性的研究

Study on the stability of anthocyanins from leaves of Perilla frutescens

紫苏是我国传统的药食两用植物，因含有丰富的花色苷成分，具有广阔的产业发展前景。随着人们对天然色素日益增长的需求，紫苏叶花色苷将成为一个良好的天然色素来源。本文研究了pH、光照、温度等因素对紫苏叶花色苷稳定性的影响：紫苏叶花色苷不耐高温，在光照条件比较稳定，然而长时间的光照也会对紫苏叶花色苷造成影响。pH对其影响显著，在pH2～4范围内相对稳定。大部分无色金属离子对紫苏叶花色苷的稳定性没有影响，而Cu^2＋、Fe^＋对紫苏叶花色苷稳定性影响较大。除此之外，氧化还原剂、苯甲酸钠和Vc对紫苏叶花色苷都有破坏作用。

Perilla frutescens is a dual-purpose plant which could be used for food and medicine. Being abundant in anthocyanins,Perilla frutescens could be widely used in many industries. With the increasing demand in natural colorant,anthocyanins from leaves of Perilla frutescens would be a good source of it. This paper studied the effect of light,metal ions, pH and temperature on the stability of anthocyanins from leaves of Perilla frutescens. Anthocyanins could not tolerate high temperature. It could be relatively stable under light. But long-time lighting still damaged anthocyanins, pH had a significant effect on its stability and it was stable in pH 2-4 solution. Most metal ions had no effect on anthocyanins.However,Cu^2＋,Fe^3 ＋ significantly had a bad effect on it. Besides,Results showed that reductant-oxidant,sodium benzoate and vitamin C had a degradation effect on anthocyanins from leaves of Perilla frutescens.