摘要
采用紫外可见分光光度法同时测定市售葡萄味饮料中苋菜红和柠檬黄的含量.饮料中苋菜红在521nm处有最大吸收峰,摩尔吸收系数ε为1.36×104 L.mol-1.cm-1;柠檬黄在428nm处有最大吸收峰,摩尔吸收系数ε为3.54×104 L.mol-1.cm-1,相对标准偏差(RSD)分别为0.10%和0.11%,回收率为95.0%～98.1%.该方法不需要进行色素的分离,所需仪器设备简单,操作简便,准确度高.
A method for simultaneous determination of amaranth and tartrazine content in drinks was developed by Ultraviolet spectrophotometer.The results showed that the maximum absorption wavelength are 521nm and 428nm for tartrazine and amaranth,respectively.with the molar absorptivity（ε） of 1.36 × 104 and 3.54 × 104 L·mol-1 · cm-1.The relative standard deviations is 0.10 percent and 0.11 percent.The recovery rates fome 95.0 percent to 98.1 percent.This method was proved to be simple,accurate and reliable.
出处
《伊犁师范学院学报（自然科学版）》
2010年第4期30-32,共3页
Journal of Yili Normal University：Natural Science Edition
关键词
分光光度法
苋菜红
柠檬黄
Spectrophotometry
Tartrazine
Amaranth
