维药唇香草挥发油稳定性的研究

The stability of the essential oil from Uygur medicine Ziziphora clinopodioides Lam.

目的:对唇香草挥发油的稳定性进行了初步研究。方法与结果:光照、温度和pH值均影响唇香草挥发油的稳定性。室温自然光照50d后挥发油OD值下降了28%,室温避光50d后挥发油OD值下降了13%,4℃自然光照50d后挥发油OD值下降了16%;在碱性条件下(保留30m in)唇香草挥发油OD值明显升高;另外Na+、K+、Mg2+、Cu2+、Fe3+对唇香草挥发油的稳定性有不同程度的影响,其中Cu2+、Fe3+对唇香草挥发油的稳定性影响较大。结论:为保证唇香草挥发油的品质,应在低温、避光以及偏酸性条件下保存,同时应避免与重金属离子接触。

Objective： The stability of the volatile oil from Ziziphora elinopodioides Lam. was investigated by the means in this paper. Methods and Results ： The results show that the illumination, the temperature and pH value affect the stability of the volatile oil from Ziziphora clinopodioides Lam. Natural light at room temperature after 50 d volatile oil OD value dropped by 28 %, dark at room temperature after 50d volatile oil OD value dropped by 13 %, 4℃ natural light after 50 d the OD value of the volatile oil dropped by 16 % ; in alkaline conditions （ save 30rain ） volatile oil significantly increased the value of OD; on the other hands, the presence of Na^＋ , K^＋ , Mg^2＋ ,Cu^2＋ ,Fe^3＋ affected the stability of the volatile oil at varying degree. Especially Cu^2＋ and Fe^3＋ have a greater impact on the stabil- ity of the volatile oil. To guarantee the quality of essential oil, it should be preserved at low temperature, evading the light, and under acid condition. Conclusion： simultaneously avoiding with the metallic ion together mixing.