Determination of rare earth elements in vanadium-titanium magnetite by ICP-MS
Accurate and rapid determination of rare earth elements in vanadium titanium magnetite plays an important role in the efficient utilization of vanadium titanium magnetite.In view of the lack of analysis methods for rare earth elements in vanadium titanium magnetite at home and abroad,5 repres-entative vanadium titanium magnetite crystals from different mining areas were selected as test samples,and hydrofluoric acid,nitric acid and sulfuric acid mixed acid solution decomposition method were ad-opted.Combined with the characteristics of inductively coupled plasma mass spectrometer with low de-tection limit,high sensitivity and low interference,the instrument conditions,internal standard elements,isotope selection and mass spectrum interference during the determination of rare earth elements in va-nadium titanium magnetite were studied.The results show that the signal intensity drift caused by mat-rix effect can be effectively reduced by using STD mode,selecting the isotopes with small interference and large abundance,and selecting the appropriate internal standard elements Rh and Re under the con-ditions of the optimal instrument parameters.In addition,it is found by the precision tests and standard recovery tests that the inductively coupled plasma mass spectrometry method can obtain good precision and accuracy for the determination of rare earth elements in vanadium titanium magnetite.
vanadium titanium magnetiterare earth elementsinductively coupled plasma mass spec-trometry(ICP-MS)accuracyprecision
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