基于流动注射分析的面粉中溴酸钾的化学发光测定。
Chemiluminescence determination of potassium bromate in flour based on flow injection analysis.
机构信息
Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, China.
Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, China; Department of Environmental Science, China Pharmaceutical University, Nanjing 210009, China.
出版信息
Food Chem. 2016 Jan 1;190:20-24. doi: 10.1016/j.foodchem.2015.05.076. Epub 2015 May 18.
A novel and highly sensitive flow-injection chemiluminescence method for the determination of potassium bromate (KBrO3) has been developed. This method is based on the luminescence properties of the KBrO3-Na2SO3-quinine sulfate system in acid medium. Optimized experimental conditions and a possible mechanism were investigated. The relative chemiluminescence intensity responded linearly to the concentration of KBrO3 in the range of 7.054 × 10(-6)-1.008 × 10(-4) mol/L with a detection limit of 2.116 × 10(-6) mol/L. The relative standard deviation (RSD) at 5.0 × 10(-5) mol/L KBrO3 (n = 12) was 2.3%. The proposed method was applied successfully to the determination of KBrO3 in flour.
一种新颖且高灵敏度的流动注射化学发光法已被开发用于测定溴酸钾（KBrO3）。该方法基于酸性介质中 KBrO3-Na2SO3-硫酸奎宁体系的发光特性。对优化的实验条件和可能的机制进行了研究。相对化学发光强度与 KBrO3 的浓度在 7.054×10(-6)-1.008×10(-4)mol/L 范围内呈线性响应，检测限为 2.116×10(-6)mol/L。在 5.0×10(-5)mol/L KBrO3（n=12）时的相对标准偏差（RSD）为 2.3%。该方法成功应用于面粉中 KBrO3 的测定。
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