二安替比林间甲氧基苯基甲烷光度法测定钢样中的锰  

Spectrophotometric Determination of Manganese in Steel with Diantipyryl-(m-methoxy)-Phenylmethane

作　　者：黄章杰[1] 杨光宇[2] 尹家元[2] 徐其亨[2] 

机构地区：[1]云南大学科研处 [2]云南大学化学系

出　　处：《云南冶金》1998年第5期51-52,共2页Yunnan Metallurgy

摘　　要：在碱性介质中，空气氧化Ｍｎ（Ⅱ）为Ｍｎ（Ⅳ），然后在磷酸介质中，Ｆｅ３＋存在下，Ｍｎ（Ⅳ）和二安替比林间甲氧基苯基甲烷（ＤＡｍＭＭ）反应生成橙色产物，λｍａｘ＝４８０ｎｍ，ε＝２５６×１０４Ｌ·ｍｏＬ－１·Ｃｍ－１。锰的含量在０～５０μｇ／２５ｍＬ内符合比尔定律，方法用于钢样中锰的测定，结果满意。In the alkaline medium, Mn(Ⅱ) is oxidized to Mn(Ⅳ) by air.In the presence of Fe 3+ ,diantipyryl-(m-methoxy)-phenylmethane react with Mn(Ⅳ) and form an orange product in phosphoric acid medium.The molar absorbtivity is 2 56×10 4 L·mol -1 ·cm -1 at 480nm and in accordance with Beer's law in the range of 0-50 mg/25ml. This method can be applied to the determination of Mn in steel with satisfactory results.

关 键 词：锰 光度法 钢 DAmMM 显色剂 

分 类 号：TG115.33[金属学及工艺—物理冶金]