混合表面活性剂存在下锰的高灵敏显色反应研究  

Study on A High sensitive Color Reaction of Manganese with Diantipyryl ( p ethoxy) phenylmethane in the Presence of Mixed Surfactant

作　　者：尹家元[1] 杨光宇[1] 杨继红[1] 徐其亨[1] 

机构地区：[1]云南大学化学系

出　　处：《岩矿测试》1998年第4期282-284,共3页Rock and Mineral Analysis

基　　金：云南省教委自然科学基金

摘　　要：研究了碱性介质中，Ｍｎ（Ⅱ）被空气氧化生成Ｈ２ＭｎＯ３，然后在Ｈ３ＰＯ４介质中，Ｃｕ（Ⅱ）和阳离子型有机相／水相微乳液（ＣＴＭＡＢ／戊醇／正庚烷／水）的存在下，Ｍｎ（Ⅳ）与二安替比林对乙氧基苯基甲烷（ＤＡｐＥＭ）生成橙色产物，λｍａｘ为４５０ｎｍ，ε＝１．９５×１０５Ｌ·ｍｏｌ－１·ｃｍ－１。Ｍｎ（Ⅱ）的质量浓度在０～３２０μｇ／Ｌ内符合比尔定律。方法用于合金中锰的测定，结果与标准值符合，５次测定结果的ＲＳＤ＜３％。In alkaline medium, Mn(Ⅱ) was oxidized to Mn(Ⅳ) by air. In the presence of Cu(Ⅱ) and CTMAB/ n C 5H 11 OH/ n C 7H 16 /H 2O, diantipyryl ( p ethoxy )phenylmethane reacts with Mn(Ⅳ) to form a orange product in phosphoric acid medium. The molar absorptivity is 1.95×10 5 L·mol -1 ·cm -1 at 450 nm. Beer′s law is obeyed in the range of 0～320 μg/L. The method has been applied to the determination of manganese in alloy. The results are in good agreement with recommended values with precision of <3% RSD( n =5).

关 键 词：锰 混合表面活性剂 显色反应 显色剂 

分 类 号：O614.711[理学—无机化学]