河南农业大学学报2017，Vol.51Issue(5)：725-729,5.
紫薯色素的变色范围及吸收光谱特性研究
Study on colour change interval and absorption spectral characteristics of pigment from purple sweet potatoes
摘要
Abstract
Purple potato pigment color range and absorption spectra properties were studied.With purple potatoes on sale from zhengzhou as samples,determination of pigment was conducted by the potential titration and absorption spectrophotometry after the pigment had been extracted under the condition of optimization.The results showed that the absorption spectrum peaks at about 530 nm in acidic solution,peak between 600 nm to 620 nm in alkaline solution and the peaks disappear in strong alkaline solution.The purple potato pigment color ranges from 7.3 to 7.8,within 0.5 pH unit only,indicating that the color change is very sharp.It can be used as a natural pH indicator and safe food colorants for use in the food industry.关键词
紫薯色素/变色范围/吸收光谱特性/pH电位滴定法Key words
pigment from purple sweet potato/colour change interval/potentiometric titration method of pH分类
农业科技引用本文复制引用
高向阳,高遒竹,张娜..紫薯色素的变色范围及吸收光谱特性研究[J].河南农业大学学报,2017,51(5):725-729,5.基金项目
郑州市科技局新兴产业研究与开发基金项目(153PXXCY186) （153PXXCY186）
