| 甲基红-溴酸钾动力学方法测定面粉中的吊白块 |
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| 引用本文： | 马中苏,牛彦清,高宇芃,陈珊珊,孙永海.甲基红-溴酸钾动力学方法测定面粉中的吊白块[J].吉林大学学报(工学版),2012(Z1):462-465. |
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| 作者姓名： | 马中苏 牛彦清 高宇芃 陈珊珊 孙永海 |
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| 作者单位： | 吉林大学生物与农业工程学院 |
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| 基金项目： | “863”国家高技术研究发展计划项目(2008AA10Z308) |
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| 摘 要： | 利用甲基红-溴酸钾动力学催化体系建立一种检测面粉中吊白块的方法。通过试验及试验条件优化,得到最优试验条件为:反应温度15℃,盐酸溶液(2mol/L)2.6mL,甲基红溶液(0.05%,w/w)3.8mL,溴酸钾溶液(0.01mol/L)1.6mL,反应时间9min,方法线性工作区间为甲醛质量浓度0.0243,1944]mg/L;精密度4.03%;回收率达到96.25%;测定结果在4h内保持稳定;抗面粉中其他物质干扰能力强。
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| 关 键 词： | 食品科学 吊白块 甲醛 甲基红 均匀设计 动力学光度法 |
Detection of sodium sulfoxylate formaldehyde in flour by Catalytic Spectrophotometry of Methyl red-KBrO3 |
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| MA Zhong-su,NIU Yan-qing,GAO Yu-peng,CHEN Shan-shan,SUN Yong-hai.Detection of sodium sulfoxylate formaldehyde in flour by Catalytic Spectrophotometry of Methyl red-KBrO3[J].Journal of Jilin University:Eng and Technol Ed,2012(Z1):462-465. |
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| Authors: | MA Zhong-su NIU Yan-qing GAO Yu-peng CHEN Shan-shan SUN Yong-hai |
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| Affiliation: | (College of Biological and Agricultural Engineering,Jilin University,Changchun 130022,China.) |
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| Abstract: | A kinetic spectrophotometric method for the detection of sodium sulfoxylate formaldehyde(SSF) in the flour based on its kinetic effect on the oxidation reaction of methyl red by bromate ion in acid medium is studied.The optimal test conditions are as follows.The reaction temperature and reaction time are 15 ℃ and 9 minutes.The concentration of hydrochloric acid(2mol/L),methyl red solution(0.05%,w/w) and potassium bromate solution(0.01 mol/L) are 2.6mL,3.8mL and 1.6mL respectively.The linear range for formaldehyde is 0.0243～1944 mg / L.The precision and recovery are 4.03% and 96.25% respectively.The test results remain stable in 4 hours with a high anti-interference ability. |
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| Keywords: | food science sodium sulfoxylate formaldehyde formaldehyde methyl red uniform design catalytic kinetic spectrophotometry |
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