2-(2-喹啉偶氮)-5-二甲氨基苯酚光度法测定铀的研究  

Study on spectrophotometric determination of uranium in ore with 2-(2-quinolylazo)-5-dimthylaminophenol

作　　者：李碧玉[1] 阮琼[1] 胡秋芬[2] 尹家元[3] 杨光宇[3] 

机构地区：[1]云南师范大学化学系,云南昆明650031 [2]玉溪师范学院化学系,云南玉溪653100 [3]云南大学化学系,云南昆明650091

出　　处：《化学研究与应用》2005年第2期233-234,共2页Chemical Research and Application

基　　金：云南省教育厅科研基金资助项目 (4 0 11114 3 )

摘　　要：A new chromogenic reagent 2-（2-quinolylazo）-5-Dimthylaminophenol（QADMAP）was synthesized,and its structure was verified by elemental analysis,infrared spectrum,（）1H nuclear magnetric resonance spectrum,and mass spectrum.The color reaction of QADMAP with uranium was studied.In the presence of pH=7.8 buffer solution,when fluorin ion and TritonX-100 medium existed,QADMAP can react with uranium and fluorin to form a stable 1∶1∶1 purple complex（F∶QADMAP∶U（VI））.The molar absorptivity is 1.12×105L·mol-1·cm-1 at 590 nm.Beer’s law is obeyed in range of 0～50 μg/25ml.This method was applied to the determination of uranium in ore with good results.A new chromogenic reagent 2-(2-quinolylazo)-5-Dimthylaminophenol(QADMAP)was synthesized,and its structure was verified by elemental analysis,infrared spectrum,()~1H nuclear magnetric resonance spectrum,and mass spectrum.The color reaction of QADMAP with uranium was studied.In the presence of pH=7.8 buffer solution,when fluorin ion and TritonX-100 medium existed,QADMAP can react with uranium and fluorin to form a stable 1∶1∶1 purple complex(F∶QADMAP∶U(VI)).The molar absorptivity is 1.12×10~5L·mol^(-1)·cm^(-1) at 590 nm.Beer's law is obeyed in range of 0～50 μg/25ml.This method was applied to the determination of uranium in ore with good results.

关 键 词：2-(2-喹啉偶氮)-5-二甲氨基苯酚 铀 光度法 

分 类 号：O657.32[理学—分析化学]