【摘要】 本文研究了Ｍｎ（Ⅱ）催化ＫＩＯ＿４氧化二苯胺磺酸钠的显色反应。在ＮａＡｃ－ＨＣｌ介质中，以氨三乙酸作活化剂，当测定波长为５１０ｎｍ时，锰浓度在０～１５０ｎｇ／２５ｍＬ范围内与吸光度呈线性关系。该法已用于测定茶叶、莲子、黄豆等样品中的痕量锰，结果个人满意。更多还原

【Abstract】 A kinetic method is described for determiningtrace amounts of manganese (Ⅱ) based on its catalyticeffect on the oxidation of sodium diphenylamine sul-fonate by potassium periodate in the presence of nitri-lo triacetic acid (NTA) as an activator.In NaAc-HClbuffer medium ,the linear range of determination is 0～150ng/mL of manganese(Ⅱ)at 510nm, Themethod has been used to determine trace manganesein tea,soybean, lotus seed and the results were satis-facory.更多还原