高碘酸钾氧化法测定头发中锰

高碘酸钾氧化法测定头发中锰滨海县卫生防疫站施梅利用适当的氧化剂将头发中锰氧化成高锰酸根离子，此离子呈色明显稳定，分光光度法比色，最低检出浓度为１μｇ／７ｍｌ，回收率为８８～１００％。１．实验部份１．１原理：二价锰离子在酸性环境下，被高碘酸根氧化成紫色...

光度法联合快速测定生铁和铸铁中Si、Mn、P

试样以含有氧化剂过硫酸铵的稀硫硝混酸溶解，再加过硫酸铵氧化磷、硅为正磷酸、正硅酸。在氧化磷、硅的同时，试样中的锰也被氧化成MnO2沉淀，再以稀过氧化氢溶液还原MnO2为Mn^2＋。本法采用联合快速光度法分析Si、Mn、P各元素，大大提高了分析速度，方法的精密度达到并优于相应的国标方法，同时简化操作，降低成本，在实际应用中获得了满意的分析结果。

Research into Uncertainty in Measurement of Seawater Chemical Oxygen Demand by Potassium Iodide-Alkaline Potassium Permanganate Determination Method

Using the glucose and L-glutamic-acid to prepare the standard substance according to the ratio of 1：1, and the artificial seawater and the standard substance to prepare a series of standard solutions, the distribution pattern of uncertainty in measurement of seawater COD is obtained based on the measured results of the series of standard solutions by the potassium iodide-alkaline potassium permanganate determination method. The distribution pattern is as follows： Uncertainty in measurement is big and not constant at the high end, but small and constant at the low end.

催化荧光光度法测定水中痕量锰

本工作提出了在弱酸条件下(pH=3.7),邻二氮菲作活性剂,通过高碘酸钾氧化曙红γ,使曙红γ的荧光减弱的催化荧光光度法测定痕量锰,灵敏度高,检测下限0.30 ng/ml,测定范围0～0.15μg/25 ml,精密度高,含0.1 μgMn(Ⅱ)样品测定11次RSD=4.2％,实测了天然水和粮食中痕量锰并与AAS法测定结果比较,结果令人满意。