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| STUDY ON THE ANALYSIS OF RARE EARTH ELEMENTS WITH THREE-BROMINE ARSENAZO PHOTOMETRY |
| JIA Yu-jing, LI Qing-chang, WANG Fei |
| Testing Center of Liaoning Non-ferrous Geology, Shenyang 110121, China |
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Abstract A sensitive colour reaction takes place between three-bromine arsenazo and rare earth elements in HC1 of 1.0 mol/L, forming stable complexes. Thus three-bromine arsenazo can be used as a color reagent to test the amount of REE in the photometry method. The analysis for two standard samples shows the precisions of 2.82% and 2.57%, and theaccuracies of -2.34% and -5.82% respectively. The method is satisfactorily applied in analysis for ores.
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Received: 19 January 2005
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2005, Vol. 14 
