微量Mn~(2+)离子对高碘酸钾与次亚磷酸钠的反应具有催化作用。经一定的反应时间后,剩余的高碘酸钾的量与催化剂Mn~(2+)离子的含量成反比。氨三乙酸(NTA)可作该反应的助催剂。基于上述原理测定了污水中微量Mn~(2+)离子的含量,与化学发光法对照,结果相当符合。实验部分 Trace Mn ~ (2+) ions have the catalytic effect on the reaction of potassium periodate with sodium hypophosphite. After a certain reaction time, the amount of remaining potassium periodate is inversely proportional to the content of Mn 2+ ions in the catalyst. Nitrilotriacetic acid (NTA) can be used as a catalyst for this reaction. Based on the above principle, the content of trace Mn ~ (2+) ions in wastewater was determined, which was in good agreement with the chemiluminescence method. Experimental part