| 荧光光度法测定面粉中溴酸钾 |
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| 引用本文： | 马红,姚国光,裴翠锦. 荧光光度法测定面粉中溴酸钾[J]. 光谱实验室, 2010, 27(5): 2032-2036 |
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| 作者姓名： | 马红 姚国光 裴翠锦 |
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| 作者单位： | 1. 西安邮电学院应用数理系,西安市长安南路563号,710121
2. 运城学院应用化学系,山西省运城市,044000 |
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| 摘 要： | 利用在盐酸介质中,溴酸根对罗丹明B的褪色作用,建立了一种测定面粉中痕量溴酸根的荧光光度法。该荧光物质的最大激发波长和发射波长分别为560nm、591nm。在试验最佳条件下,测定的线性回归方程为ΔF=3.6916C+110.38,r=0.9977(C:10-6mg/mL)。该方法检出限为2.9×10-7mg/mL,线性范围为4×10-7—2.8×10-5mg/mL。该法具有良好的灵敏度、费用低、操作简便快捷等优点,适于快速检测面粉等食品中的痕量溴酸根离子。
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| 关 键 词： | 荧光光度法 罗丹明B 溴酸钾 面粉 |
Determination of Ptassium Bromate in Wheat Flour by Fluorescence Spectrophotometry |
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| MA Hong,YAO Guo-Guang,PEI Cui-Jin. Determination of Ptassium Bromate in Wheat Flour by Fluorescence Spectrophotometry[J]. Chinese Journal of Spectroscopy Laboratory, 2010, 27(5): 2032-2036 |
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| Authors: | MA Hong YAO Guo-Guang PEI Cui-Jin |
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| Affiliation: | a(Department of Applied Mathematics and Physics,Xi＇an University of Post and Telecommunication,Xi＇an 710121,P.R.China)a(Department of Applied Chemistry,Yuncheng University,Yuncheng,Shanxi 044000,P.R.China) |
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| Abstract: | A new photometric method for the determination of microamounts of bromate in the flour was developed used the fluorescent quenching of Rhodamine B by bromate in HCl medium.The maximum excitation wavelength and the maximum emission wavelength were 560nm and 591nm,respectively.In the optimum conditions,the regressive equation was ΔF=3.6916C＋110.38（C：10-6mg/mL）,r=0.9977.The detection limit for benzoyl peroxide was 2.9×10-7mg/mL,and the linear range was 4×10-7—2.8×10-5mg/mL.The method has good sensitivity,low cost,fast and easy to operate,suitable for rapid detection of trace bromate ion in flour and other food. |
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| Keywords: | Fluorescence Spectrophotometry Rhodamine B Potassium Bromate Wheat Flour |
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