“…However, although these techniques have their own advantages, they suffer from limitation of being rather time-consuming (gravimetry) or poor accuracy due to the dilution of the sample (spectrophotometry, AAS, ICP-OES, and ICP-MS). To overcome the above analytical difficulties, XRF spectrometry can be considered as a potent tool, for it is especially applicable to the fast and accurate analysis of high and medium content elements and has been wildly used in the field of metallurgy [11][12][13], geology [14,15],environment [16][17][18], drug [19], food [20], and so on. Based on its advantages, an XRF method is tried here to determine tungsten in Ta-W alloy.…”