二安替比林对甲基苯基甲烷与Ce(Ⅳ)的显色反应研究  

STUDY OF THE COLOUR REACTION OF DIANTIPYRINYL ( p-METHY)-PHENYLMETHANE WITH CERIUM(Ⅳ)

作　　者：罗琴[1] 谢启明[1] 徐其亨[2] 

机构地区：[1]云南楚雄师专化学系,楚雄675000 [2]云南大学化学系

出　　处：《理化检验（化学分册）》2001年第1期37-38,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：研究了二安替比林对甲基苯基甲烷 (DAp MM)与 Ce( )的显色反应 ,在 H3PO4 介质中 ,DAp MM与 Ce( )生成橙色产物。λmax=485nm,ε=3.53× 1 0 5L·mol-1·cm-1。Ce( )含量在0 .5～ 8.0μg/2 5ml内符合比耳定律 ,该体系灵敏度高 ,选择性好 ,用于镁合金和含锌矿石中微量铈的测定 ,结果满意。A highly sensitive and selective photometric method was proposed for the determination of Ce(Ⅳ) with diantipyrinyl ( p methy) phenylmethane (DA p MM) in the presence of Mn(Ⅱ). Cerium(Ⅳ) reacts with DA p MM to form an orange colored complex in phosphoric acid medium. Its absorption maxima lies at 485nm with a molar absorptivity of 3.53×10 5L·mol -1 ·cm -1 . Beer′s law is obeyed in the rang of 0.5~8.0μg/25ml. The method has been applied to the determination of Ce(Ⅳ) in ores and alloys.

关 键 词：光度法 二安替比林对甲基苯基甲烷 铈(Ⅳ) 显色反应 镁合金 微量分析 含锌矿石 

分 类 号：TG115.33[金属学及工艺—物理冶金] P575.4[金属学及工艺—金属学]