二安替比林邻乙氧基苯基甲烷与钒的高灵敏显色反应研究  

Study on Highly Sensitive Colour Reaction of Vanadium with Diantipyryl ( o ethoxy) phenylmethane

作　　者：林会松[1] 杨光宇[1] 尹家元[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3期190-192,196,共4页Rock and Mineral Analysis

基　　金：云南省教委自然科学基金

摘　　要：合成了新试剂二安替比林邻乙氧基苯基甲烷（ＤＡｏＥＭ），研究了它和Ｖ（Ⅴ）的显色反应。在Ｈ３ＰＯ４介质中，Ｍｎ（Ⅱ）和吐温２０协同作用下，ＤＡｏＥＭ和Ｖ（Ⅴ）生成橙色产物，λｍａｘ＝４８０ｎｍ，ε＝１．４×１０６Ｌ·ｍｏｌ－１·ｃｍ－１，Ｖ（Ⅴ）质量浓度在４～６０μｇ／Ｌ符合比尔定律。用于钢样和中草药中Ｖ（Ⅴ）的测定，结果与原子吸收法结果一致，５次测定结果的ＲＳＤ在１．８％～３．１％。In this work, diantipyryl ( o ethoxy) phenylmethane(DA o EM) was synthesized and the colour reaction of DA o EM with V(Ⅴ) was studied. In the presence of Mn(Ⅱ) and Tween 20, DA o EM reacts with V(Ⅴ) to form a orange product in phosporic acid medium. The maximum absorbance of the product is at 480 nm with molar absorptivity of 1.4×10 6 L?mol -1 ?cm -1 . Beer′s law is obeyed in the range of 4.0?60 μg/L with good stability. The method has been applied to the determination of trace V(Ⅴ) in steel and Chinese herbs. The results are in good agreement with those obtained by atomic absorption spectrometry with precision of 1.8%?3.1% RSD( n =5).

关 键 词：二安替比林邻乙氧基苯基甲烷 钒 分光光度法 

分 类 号：O614.511[理学—无机化学]