四川理工学院学报：自然科学版2012，Vol.25Issue(5)：25-28,4.
分光光度法测定饮料中色素含量
Determination of Pigments in Beverage by Ultraviolet Spectrophotometry
孙延春 1敬铭1
作者信息
- 1. 四川理工学院化学与制药工程学院学院,四川自贡643000
- 折叠
摘要
Abstract
A method for simultaneous determination of two pigments in beverage are developed by Ultraviolet spectropho- tometry. Tartrazine and ponceau 4R in beverage is determinated by this method. The results show that maximum absorption wavelengths are 424 nm and 507 nm respectively, the absorption coefficients are 32. 22 L. g^-1 . cm-i and 35.92 L.g^-1 . cm^-1 respectively, the molar absorption coefficients are 1.72 × 10^4 L. mol^-1.cm^-1and 2. 17 × 10^4 L. mol^-1. cm^-1 respectively. The contents of tartrazine and ponceau 4R in beverage are 4. 32 × 10^3 mg. mL^-1 and 3.36 × 10.3 mg. mL^-1respectively, relative standard deviations are 2.89% and 2.57% respectively, the recovery rates are 89.7% and 90. 6% respectively. This method is proved to be simply and convenient and deserved to be popularized.关键词
分光光度法/色素/饮料Key words
spectrophotometry/pigment/beverage分类
化学化工引用本文复制引用
孙延春,敬铭..分光光度法测定饮料中色素含量[J].四川理工学院学报：自然科学版,2012,25(5):25-28,4.
