流动注射化学发光法测定Mn(Ⅱ)

Flow injection chemiluminescence determination of Mn(Ⅱ)

在酸性条件下，溴酸钾氧化鲁米诺产生化学发光，Mn^2＋对这一体系的化学发光具有增强作用。据此，结合流动注射技术，建立了一种测定Mn^2＋的新方法。线性范围为1．0×10^-8～6．0×10^-6 mol／L；检出限为8．0×10^-9mol／L（30）；对1．0×10^-6mol／L的Mn^2＋进行了平行测定（n=11），其相对标准偏差为2．4％。该方法可用于矿泉水中Mn^2＋的测定。

A new method for the determination of soluble Mn（ Ⅱ ） was developed using flow injection chemiluminescence analysis based on that soluble Mn（ Ⅱ ） greatly enhancing the emission intensity of the chemiluminescence reaction of Potassium bmmate and luminol in acid solution. The linear range was 1.0×10^-8 to 6.0×10^-6 mol/Lwith a detection limit of 8.0 ×10^-9 mol/L for soluble Mn（ Ⅱ ） and the relative standard deviation was 2.4% （c = 1.0 ×10^-6mol/L, n = 11）. The method was successfully applied to assay of soluble Mn（ Ⅱ ） in mineral water with satisfactory results.