二安替比林基_(2_溴)苯基甲烷与铈的显色反应及应用  

Chromogenic Reaction of Diantipyryl_(2_bromo)_phenylmethane with Cerium(Ⅳ) and Its Analytical Application

作　　者：杨文荣 毛文灏 徐其亨[2] 

机构地区：[1]云南民族学院化学系 [2]云南大学化学系

出　　处：《岩矿测试》1997年第1期73-74,77,共3页Rock and Mineral Analysis

摘　　要：合成了二安替比林基＿（２＿溴）苯基甲烷（ＤＡｏＢＭ）。在Ｍｎ（Ⅱ）和吐温＿８０存在下，Ｃｅ（Ⅳ）与ＤＡｏＢＭ反应生成有色化合物，λｍａｘ为４８０ｎｍ，摩尔吸光系数为３１×１０５Ｌ·ｍｏｌ－１·ｃｍ－１。Ｃｅ（Ⅳ）的质量浓度为０００４～０２ｍｇ／Ｌ时符合比尔定律。方法已用于稀土矿石中微量Ｃｅ（Ⅳ）的测定。Synthesis of diantipyryl_(2_bromo)_phenylmethane(DAoBM) and a sensitive spectrophotometric method for determination of Ce(Ⅳ) are reported in this paper. In the presence of Tween_80 and Mn(Ⅱ), Ce(Ⅳ) reacts with DAoBM and forms an orange_red complex in phosphoric acid medium. Maximum absorbance of the complex is at 480 nm with absorptivity of 3.1×10 5 L·mol -1 ·cm -1 . Beer′s law is obeyed in the range of 0.004～0.2 mg/L of Ce(Ⅳ). The method has been applied to determination of Ce(Ⅳ) in REE ores. The results are in good agreement with that obtained by ICP_AES.

关 键 词：二安替比林基 溴 苯基甲烷 铈 显色反应 

分 类 号：O614.332[理学—无机化学]