The conditions of colour reaction of 2-(1,3,4-Triazolylazo)-5-Diethylamino-benzoic acid(TZDBA)with vanadium(V) are presented.The results show that the colour reagent reacts with vanadium,and forms a stable purple red ...The conditions of colour reaction of 2-(1,3,4-Triazolylazo)-5-Diethylamino-benzoic acid(TZDBA)with vanadium(V) are presented.The results show that the colour reagent reacts with vanadium,and forms a stable purple red complex in the medium of HCl with pH 2.0. The apparent molar absorptivity is 3 17×10 4L·mol -1 ·cm -1 ,and the maximum absorption wavelength is at 571 nm.Beer’s law is obeyed in the range of 0～20 μ g/25ml for V(V).The method has been used for the direct determination of vanadium in a aluminium alloy sample and a synthetic water sample with satisfactory results.展开更多
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 s...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.展开更多
文摘The conditions of colour reaction of 2-(1,3,4-Triazolylazo)-5-Diethylamino-benzoic acid(TZDBA)with vanadium(V) are presented.The results show that the colour reagent reacts with vanadium,and forms a stable purple red complex in the medium of HCl with pH 2.0. The apparent molar absorptivity is 3 17×10 4L·mol -1 ·cm -1 ,and the maximum absorption wavelength is at 571 nm.Beer’s law is obeyed in the range of 0～20 μ g/25ml for V(V).The method has been used for the direct determination of vanadium in a aluminium alloy sample and a synthetic water sample with satisfactory results.
文摘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.
