金属离子对玫瑰花色苷水提液稳定性的影响

Effect of Metal Ions on the Stability of Aqueous Solution of Rose Anthocyanins

该研究以玫瑰花色苷为研究对象,以CIELAB色空间a*、b*和△E*值及花色苷保存率为评价指标,研究了10种金属离子对玫瑰花色苷颜色稳定性的影响。结果表明:在pH值为3.0的溶液中,Na^(+)、Mg^(2+)、K^(+)、Pb^(2+)对玫瑰花色苷的颜色稳定性无明显影响;Ca^(2+)、Zn^(2+)、Mn^(2+)、Al^(3+)4种离子不会使花色苷水提液颜色发生明显改变,Cu^(2+)可导致水提液颜色产生肉眼可见的变化,较低浓度的Fe^(3+)可使花色苷水提液明显褪色,花色苷保存率大幅降低。玫瑰花色苷进行加工时,应避免与铜、铁质器具接触。该研究结果为玫瑰花色苷的开发应用提供了理论依据。

In this study,taking rose anthocyanins as the research object,the effects of 10 kinds of metal ions on the color stability of rose anthocyanins are studied by using CIELAB color space a*,b* and △E* values and anthocyanin retention rate as the evaluation indexes.The results show that Na^(+),Mg^(2+),K^(+)and Pb^(2+)have no significant effect on the color stability of rose anthocyanins in the solution with pH of 3.0.Ca^(2+),Zn^(2+),Mn^(2+)and Al^(3+) ions do not significantly change the color of anthocyanin aqueous solution,while Cu^(2+)can cause visible change in the color of aqueous solution.Lower concentration of Fe^(3+) can make the anthocyanin aqueous solution fade obviously,and the anthocyanin retention rate decreases significantly.When rose anthocyanins are processed,should avoid contacting with copper,iron utensils.The results have provided a theoretical basis for the development and application of rose anthocyanins.