Determination of trace rare earth elements by X-ray fluorescence spectrometry after preconcentration on a new chelating resin loaded with thorin

被引：36

作者：

De Vito, IE ^{[1
]}

Masi, AN ^{[1
]}

Olsina, RA ^{[1
]}

机构：

[1] Natl Univ San Luis, Dept Analyt Chem Dr Carlos B Marone, Fac Chem Biochem & Pharm, San Luis, Argentina

来源：

TALANTA | 1999年 / 49卷 / 04期

关键词：

rare earth elements; X-ray fluorescence spectrometry; thorin;

D O I：

10.1016/S0039-9140(99)00089-2

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A very stable chelating resin was prepared by adsorption of (o-[3,6-disulfo-2-hidroxy-1-naphthylazo]-benzenearsonic acid) (thorin) on a macroporous resin Amberlite XAD-7. The optimal conditions for preparing it were obtained through the study of the adsorption properties of the resin and the thermodynamic quantities of the adsorption processes. Likewise, the behavior of the loaded resin with the rare earth elements (REE) were studied (pH of retention, sorption kinetics, etc). The conditions to prepare a thin film with this system were also evaluated. The loaded resin was successfully used for the separation and preconcentration of Sm(III), Eu(III) and Gd(III) prior to their determination by X-ray fluorescence (XRF) spectrometry. The preconcentration factor obtained was 500 and the concentrations at low detection limit were 13.8, 17 and 15.7 mu g 1(-1) for Sm, Eu and Gd, respectively. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：929 / 935

页数：7

共 13 条

[1] MULTIELEMENT-PRECONCENTRATION FOR ATOMIC SPECTROSCOPY BY SORPTION OF DITHIOCARBAMATE-METAL COMPLEXES (EG, HMDC) ON CELLULOSE COLLECTORS [J].