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本文报道了在pH=5.5的HAc-NH_4Ac缓冲溶液中,于单扫描示波极谱仪上,E_p=-0.52V(SCE)处,铀(VI)与8-羟基喹啉(HOx)能产生一灵敏的络合吸附波。并试验了影响波高的各种因素,在实验条件下,导数波波高与铀浓度在0.02—2.50ppm范围内呈线性关系。采用TBP萃淋树脂分离后测定矿物、岩石中痕量铀,得到了满意的结果。实验证明,该络合物为—荷负电的络阴离子,其络合物组成为(UO_2·Ox_4)~(2-·),条件隐定常数β=1.55×10~(18)。
This paper reports that uranium (VI) and 8-hydroxyquinoline (HOx) can be produced in HAc-NH_4Ac buffer solution with pH = 5.5 on a single scanning oscilloscope with E_p = -0.52V (SCE) A sensitive complex adsorption wave. Under the experimental conditions, the wave height of the derivative wave is linear with the uranium concentration in the range of 0.02-2.50ppm. The separation of trace amounts of uranium in minerals and rocks by TBP extraction resin was satisfactory. Experiments show that the complex is a negatively charged complex anion with a composition of (UO 2 · Ox_4) ~ (2- ·) and a constant constant of β = 1.55 × 10 ~ (18).