To study the effects of metal ion on stability of natural red pigment extracted from the fruits of glossy privet, the influence of metal ion on the pigment was mensurated by spectrophotometer.

• 研究常见金属离子对女贞果红色素稳定性的影响。用分光光度法测定了一些常见金属离子对色素溶液吸光度的影响。