School of Chemistry and Chemical Engineering, Guangxi University, Nanning, China.
Nat Prod Res. 2012;26(8):765-9. doi: 10.1080/14786419.2010.547859. Epub 2011 Sep 6.
Genipin blue is a pigment prepared from the reaction of genipin with amino acid. We describe herein a new method used to prepare genipin blue, water-soluble blue pigments, through the reaction of hen egg protein with genipin. The effects of reaction time, reaction temperature, the pH value of the solution and the mass ratio of the reactants on the preparation are studied. One part of genipin reacted with eight parts of hen egg protein (w/w) in water (pH value of reaction system 7.5) at 60°C for 96 h and gave blue pigments with the maximum colour value of 146.2. The blue pigments showed identical absorption activity in UV spectroscopy (λ(max )= 584 nm) to that of gardenia blue pigments, which were prepared from the reaction of genipin with amino acid.
京尼平蓝是由京尼平与氨基酸反应制备的一种色素。本文描述了一种通过京尼平与鸡卵清蛋白反应制备京尼平蓝、水溶性蓝色颜料的新方法。研究了反应时间、反应温度、溶液 pH 值和反应物质量比对制备的影响。在 60°C 下，将 1 份京尼平与 8 份鸡卵清蛋白（w/w）在水中（反应体系 pH 值为 7.5）反应 96 小时，得到最大色值为 146.2 的蓝色颜料。蓝色颜料在紫外光谱（λ(max)=584nm）中的吸收活性与由京尼平与氨基酸反应制备的栀子蓝色素相同。
