[Study on solid phase extraction and spectrophotometric determination of uranium in water with 2-(2-quinolylazo)-5-dimthylaminophenol].
A new chromogenic reagent 2-(2-quinolylazo)-5-Dimthylaminophenol (QADMAP) was synthesized, and its structure was verified by elemental analysis, infrared spectrum, 1H nuclear magnetic resonance spectrum, mass spectrumand UV-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 exist, QADMAP can react with uranium and fluorin to form a stable 1 : 1 : 1 stable complex [F- :QADMAP : U(VI)]. The molar absorptivity is 1.05 x 10(5) L x mol(-1) x cm(-1) at 590 nm. Beer's law is obeyed in range of 0-20 microg/10 mL. The uranium in samples can be enriched and separated by solid phase extraction with TBP resin cartridge. This method is applied to the determination of uranium in water sample. The relative standard deviations are 2.2%-3.6%, and the recoveries are 94%-105%.
Wang
Liang
L
Department of Chemical Engineering, Dalian Nationalities University, Dalian 116600, China.
Yuan
Zhuo-Bin
ZB
Hu
Qiu-Fen
QF
Yang
Guang-Yu
GY
Yin
Jia-Yuan
JY
D001372:Aza Compounds / Q000737:chemistry*; D005461:Fluorine / Q000737:chemistry; D005618:Fresh Water / Q000032:analysis / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure; D017830:Octoxynol / Q000737:chemistry; D011804:Quinolines / Q000737:chemistry*; D015203:Reproducibility of Results; D045483:Rivers / Q000737:chemistry; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*; D013053:Spectrophotometry; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D014501:Uranium / Q000032:analysis* / Q000737:chemistry; D014875:Water Pollutants, Radioactive / Q000032:analysis* / Q000737:chemistry
C472811:2-(2-quinolinylazo)-5-dimethylaminophenol; D001372:Aza Compounds; D011804:Quinolines; D014875:Water Pollutants, Radioactive; D005461:Fluorine; D014501:Uranium; D017830:Octoxynol