| 紫外-可见分光光度法测定奶粉中的香兰素含量 |
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| 引用本文： | 冯彩婷,杨丽霞,李书静.紫外-可见分光光度法测定奶粉中的香兰素含量[J].河北化工,2012,35(6):78-80. |
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| 作者姓名： | 冯彩婷 杨丽霞 李书静 |
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| 作者单位： | 周口师范学院,河南周口,466000 |
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| 基金项目： | 河南省科技攻关计划项目 |
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| 摘 要： | 采用紫外-可见分光光度法测定了几种奶粉中的香兰素含量。在最大吸收波长435.0nm处,其吸光度与香兰素含量呈正比,线性方程为y=7.493 42x+0.001 3(r=0.999 7),线性范围为0.010 4～0.165 2g/L,加标回收率为98.6%,RSD为0.34%。该方法重现性好,适用于食品中香兰素含量的测定。
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| 关 键 词： | 香兰素 紫外-可见分光光度法 硫代巴比妥酸 奶粉 |
Determination of Vanillin in Milk Powder by Ultraviolet-visible Spectrophotometry |
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| FENG Cai-ting,YANG Li-xia,LI Shu-jing.Determination of Vanillin in Milk Powder by Ultraviolet-visible Spectrophotometry[J].Hebei Chemical Engineering and Industry,2012,35(6):78-80. |
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| Authors: | FENG Cai-ting YANG Li-xia LI Shu-jing |
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| Affiliation: | (Zhoukou Normal University,Zhoukou 466000,China) |
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| Abstract: | To determin the contents of vanillin in some milk powder by ultraviolet-visible spectrophotometry. A linear regression equation for absorbance （y） at 435.0 nm wavelength as a function of vanillin concentration （x） was established：y=7. 493 42x＋0. 001 3（r=0. 999 7） ,with a linear range from 0. 010 4 to 0. 165 2 g/L. The average spike recovery of vanillin was 98.6%, the relative standard deviation was 0.34%. This method has good reproducbility, and is suitable for the determination of vanillin in foods. |
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| Keywords: | vanillin ultraviolet-visible spectrophotometry thiobarbituric acid milk powder |
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