邻氯苯基荧光酮胶束光度法测定氮化硅中镁的研究  

Micellar Spectrophotometic Determination of Magnesium Oxide in Silicon Nitride with o-Chlorophenylfluorone

作　　者：陈同森[1] 赵欣[1] 任文 晋勇 

机构地区：[1]湖南大学化学化工系

出　　处：《岩矿测试》1994年第4期254-258,共5页Rock and Mineral Analysis

摘　　要：研究了在氯化十六烷基吡啶（ＣＰＣ）和乳化剂ＯＰ存在下，Ｍｇ与邻氯苯基荧光酮（ｏ－Ｃｌ－ＰＦ）的显色反应。在ｐＨ１２的碱性介质中，Ｍｇ（Ⅱ）与ｏ－Ｃｌ－ＰＦ形成１：３的蓝色配合物，其λ＿ｍａｘ＝６１２ｎｍ，表现摩尔吸光系数ε＿６１２＝１．３９×１０￣５Ｌ·ｍｏｌ￣－１·ｃｍ￣－１，Ｍｇ（Ⅱ）在０～０．２μｇ／ｍｌ范围内符合比尔定律。方法用于新陶瓷材料氮化硅（Ｓｉ＿３Ｎ＿４）中微量ＭｇＯ的测定，其结果与原子吸收光谱法相符。agnesium(Ⅱ)reacts with o-Cl-PF to form a 1:3 blue complex at pH 12 in the presenceof CPC and OP. The colour system is highly sensitive,the apparent molar absorptivity is 1. 39×10￣5L· mol￣-1·cm￣-1 at 612nm. Beer’s law is obeyed in the range of 0～0.2μg/ml for Mg(Ⅱ).The method has been successfully applied to the direct determination of MgO in silicon nitride.Analytical results were in good agreement with atomic absorption spectrometry.

关 键 词：镁 邻氯苯基荧光酮 胶束分光光度法 氮化硅 

分 类 号：O613.72[理学—无机化学]