| 2,4-二硝基苯肼法测定两种饮料中Vc的含量 |
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| 引用本文： | 孙艳丽. 2,4-二硝基苯肼法测定两种饮料中Vc的含量[J]. 饮料工业, 2014, 0(4): 34-37 |
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| 作者姓名： | 孙艳丽 |
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| 作者单位： | 菏泽学院化学化工系,山东菏泽274015 |
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| 摘 要： | 以2,4-二硝基苯肼为显色剂,利用分光光度法对市售两种品牌饮料中Vc的含量进行了测定。固定吸收波长为500nm,当活性炭用量为1g、水浴时间为3h、温度为37.2℃时,测定条件最佳。Vc标准溶液的线性回归方程为y=0.0234x+0.0679,R2=0.9967。结果表明,该方法简便易行、准确,能满足饮料中Vc含量的测定。
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| 关 键 词： | 饮料 维生素C 分光光度法 -二硝基苯肼 |
Determination of Contents of Vc in 2 Drinks by 2,4-dinitrophenylhydrazine Method |
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| SUN Yan-li. Determination of Contents of Vc in 2 Drinks by 2,4-dinitrophenylhydrazine Method[J]. Beverage Industry, 2014, 0(4): 34-37 |
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| Authors: | SUN Yan-li |
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| Affiliation: | SUN Yan-li (Department of Chemistry and Chemical Engineering, Heze University, Heze 274015, China) |
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| Abstract: | With 2, 4-dinitrophenylhydrazine as the chromogenic reagent, spectrophotometry was used to determine the contents of Vc in 2 drinks. The maximum absorption wavelength was 500nm, and the optimal determination conditions included carbon dosage lg, bath time 3h and temperature 37.2℃. The linear regression equation was y=0.0234x＋0.0679, and R^2=0.9967. The results showed that the method was simple and accurate, and could be used to determine the content of Vc in drinks. |
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| Keywords: | beverage Vc spectrophotometry 2,4-dinitrophenylhydrazine |
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