Determination of Tungsten in Ferrotungsten by X-ray Fluorescence Spectrometry with Centrifugal Casting Sample Preparation

A rapid analysis method of X-ray fluorescence spectrometry for determining tungsten in ferrotungsten was established with pure iron as flux and centrifugal casting method for sample preparation.The result indicated tungsten had excellent distribution uniformity in sample after melting.No significant difference existed among samples after melting.Meanwhile,test measurement and exclusion were conducted on the potential spectral overlap interference factors in the sample.National standard sample and manually prepared calibration samples were used to draw calibration curve,with linearity scope of 50.00%-85.00%.A comparison was conducted between the testing result of gravimetric method and the proposed method,and the difference was within ±0.20%.The method can meet the the routine testing requirements for fast determination of tungsten in ferrotungsten.

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