Abstract：The rhodamine B was oxidized by potassium bromate in acid conditions to generate fluorescence quenching reaction, which could be catalyzed by manganese. The fluorescence quenching effect of manganese on the oxidization of rhodamine B by potassium bromate was studied. The optimal conditions for the determination of manganese were investigated. In 50 mL colorimetric tube ,3.5 mL of 1.0×10-6 mol/L rhodamine B solution, 1.5 mL of 1.0×10-4 mol/L potassium bromate solution,1.2 mL of 0.1 mol/L hydrochloric acid and manganese solution with different amounts were added in sequence . After heating at 60 ℃ for 8 min, the content of manganese was determined. The results showed that the mass concentration of manganese in range of 1.0×10-8-2.0×10-7 mol/L was linear to the fluorescence quenching extent. The detection limit was 2.0×10-9 mol/L. The proposed method was applied to the determination of manganese in water sample. The found results were consistent with those obtained by atomic absorption spectrometry. The relative standard deviations (RSD, n=11) were between 3.9% and 4.2%.
崔英,吕建晓. 锰对溴酸钾氧化罗丹明B的荧光猝灭效应研究及其应用[J]. 冶金分析, 2016, 36(1): 75-78.
CUI Ying,LU Jian-xiao. Study on the fluorescence quenching effect of manganese on the oxidization of rhodamine B by potassium bromate and its applicaiton. , 2016, 36(1): 75-78.
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