Determination of Gallium in Rare Earth Ore by Inductively Coupled Plasma-Mass Spectrometry Using Polyurethane Foam Pre-concentration/Separation

DONG Xue-lin; HE Hai-yang

doi:10.15898/j.cnki.11-2131/td.2016.01.008

2016 Vol. 35, No. 1

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DONG Xue-lin, HE Hai-yang. Determination of Gallium in Rare Earth Ore by Inductively Coupled Plasma-Mass Spectrometry Using Polyurethane Foam Pre-concentration/Separation[J]. Rock and Mineral Analysis, 2016, 35(1): 42-47. doi: 10.15898/j.cnki.11-2131/td.2016.01.008

Citation:

DONG Xue-lin, HE Hai-yang. Determination of Gallium in Rare Earth Ore by Inductively Coupled Plasma-Mass Spectrometry Using Polyurethane Foam Pre-concentration/Separation[J]. Rock and Mineral Analysis, 2016, 35(1): 42-47. doi: 10.15898/j.cnki.11-2131/td.2016.01.008

Determination of Gallium in Rare Earth Ore by Inductively Coupled Plasma-Mass Spectrometry Using Polyurethane Foam Pre-concentration/Separation

Geological Experimental Testing Center of Hubei Province, Wuhan 430034, China

Received Date: 07 July 2015

Revised Date: 04 November 2015

Accepted Date: 14 November 2015

Publish Date: 25 January 2016

Abstract

Abstract

Gallium in rare earth ore is commonly determined by Inductively Coupled Plasma-Mass Spectrometry(ICP-MS), but high content of rare earth will result in significant mass spectrum interferences.In this study, Ga in sample solution was absorbed by polyurethane foam in 6 mol/L HCl.Gallium adsorbed on the foam could be quantitatively eluted with 0.5 mol/L NH₄Cl solution in a heating water bath for 30min.The adsorption-eluted efficiency is higher than 99%.Most of the matrix elements could be separated from Ga by polyurethane foam so the mass spectrum interferences were reduced effectively.The detection limit was 0.022μg/g.The accuracy of the developed method was evaluated by analyzing Ga in soil and stream sediment standard reference materials.The proposed method was successfully applied to gallium determination in geological samples and rare earth ores.The recoveries are 94.1%-100.6% and the precision is 2.2%-4%(RSD, n=12).
- rare earth ore /
- gallium /
- polyurethane foam /
- separation and preconcentration /
- Inductively Coupled Plasma-Mass Spectrometry

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References

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