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Citation: JI Zheng-Ping, HU Hong-Guo, YAN Bing-Yi, ZHU Guang-Xu, XU Qin, HU Xiao-Ya. An Electrochemiluminescence Method for Determination of Manganese (Ⅱ)[J]. Chinese Journal of Analytical Chemistry, ;2017, 45(3): 397-402. doi: 10.11895/j.issn.0253-3820.160784 shu

An Electrochemiluminescence Method for Determination of Manganese (Ⅱ)

College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China

Received Date: 27 October 2016
Revised Date: 22 December 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 21575124, 21675140)

In the presence of silver ion, Mn²⁺ could be electro-oxidized to potassium hypermanganate in phosphoric acid solution, which could effectively react with pyrocatechol in acid solution and luminol in sodium hydroxide solution to produce chemiluminescence. On the basis of this, a novel indirect approach for the detection of Mn²⁺ was established. The effect of silver ions on the electrochemical oxidation of Mn²⁺ was studied. When 1.5×10^-5 mol/L Ag⁺ and 0.01 mol/L phosphoric acid solution were used in the process of electrochemical oxidation, the CL intensity could be up to the maximum value after the above solution was electrolyzed for 2 min. The relation of CL intensity and Mn²⁺ concentration in the solutions at different pH and the selectivity were also investigated. When the pyrocatechol was used as luminescent reagent in the acidic medium, the CL intensity was linearly to the Mn²⁺ concentration in the range of 1.82×10^-7-7.27×10^-5 mol/L with excellent selectivity. Common ions had little interferences in the determination of Mn²⁺. The method was successfully applied to the determination of Mn²⁺ in surface water and drinking water with satisfactory results.
- Manganese (Ⅱ),
- Electrochemical oxidation,
- Chemiluminescence
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