温度、pH及金属离子对牵牛花色素影响的研究

Research of the influences of temperature,pH and metal ions on morning glory pigment

目的探讨温度、pH值及金属离子对牵牛花色素的色调、最大吸收波长和稳定性的影响。方法采用紫外分光光度法。结果牵牛花色素对热稳定性高,在不同pH值溶液中显示不同的色调,且金属离子中仅铁离子对其有一定影响。结论在牵牛花色素的利用过程中要注意pH和铁离子的影响。

Objective： To investigate the effects of temperature, pH and metal ions on the color, maximum absorption wavelength and stability of morning glory pigment. Method： UV spectrophotometry was used. Results： Although it showed good hot stability, the morning glory pigment displayed different colors in solutions of different pH and was influenced only by ferric chloride in all detected metal ions. Conclusion： More attention should be paid to pH and ferric chloride in using morning glory pigment.