Studies on the Voltammetric Behaviors of Lumogallion and Rare Earth-Lumogallion

Abstract

Abstract: In Britton-Robbinson buffer solution, as the pHranged from 2 to 10, an irreversible adsorptive reducing wave of lumogallion(LMG) was obtained.The electrode processes were verified as follows:(这里有图片19930211-187-1.gif)The meanings of the above symbols can be seen in the text.At pH₄ and at the surface of mercury electrode, the adsorption of LMGobeys Frumkin isotherm.The area occupied by each LMGion at the electrode surface was measured as 89×10^-2 nm².In 0.2 mol/L NH₃-NH₄Cl buffer solution, at pH 9.5, the sensitive adsorptive complex waves of rare earth ions-MGwere obtained by single-sweep polarography.It can be formed by all rare earth ions, but the heavy rare earth are more sensitive than the light rare earth.The composition of the elec-troactive complexes were determined as RE (Ⅲ):LMG=1:2.The proposed method has been applied to the determination of holmium content in luminescent material(BaFCl:Ho).

Key words: Lumogallion, Rare earth, Voltammetry

TrendMD:

LI Nan-Qiang, HE Wei-Jun . Studies on the Voltammetric Behaviors of Lumogallion and Rare Earth-Lumogallion[J]. Chem. J. Chinese Universities, 1993, 14(2): 187.

References

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