Comparison of Different Analytical Methods for the Determination of Niobium,Tantalum,Hafnium and Zirconium in Geological Samples
The pretreatment methods for the determination of Niobium,Tantalum,Hafnium and Zirconium in geological samples by different acid dissolution and alkali fusion were studied.The determination was carried out by inductively coupled plasma emission spectrometry and inductively coupled plasma mass spectrometry.Different kinds of geological sample standard materials were selected for conditional experiments,and the advantages and disadvantages of three dif-ferent analytical methods,open acid dissolution,closed digestion and alkali fusion,were analyzed for laboratory selec-tion under different experimental conditions.The method of nitric acid-hydrofluoric acid-hydrogen peroxide system closed digestion and acid dissolution ICP-MS detection can be used to determine Niobium,Tantalum,Hafnium and Zir-conium,and the relative standard deviation(RSDn=12)is less than 4％.It has been applied to the analysis and de-tection of a batch of actual samples in ZURAK area,Alpine State,Nigeria and good results have been achieved.
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