Detailed methods for determining molybdenum and tungsten in typical samples, and the analysis of these metals and their alloys by both classical and modern techniques, have also been included. TrueX 860 handheld (XRF)X-Ray Fluorescence Spectrometers are ideal instruments for fast and non-destructive alloy analysis and positive material identification (PMI). A certified molybdenum–tungsten alloy (Mo 70 wt% and W 30 wt%) was chosen as a replacement for the high Z impurities deposited on. Alloy verification is an important process for many businesses today in order to determine alloy composition and grade. It has the characteristics of small volume, light weight, easy to carry, no need for sample preparation, alignment measurement, high precision, rapid detection, great value and. Current trends in the analytical chemistry of molybdenum and tungsten are evident from the numerous publications that have appeared during the last decade, and analysts, especially those who have become actively engaged in this field for the first time, often find difficulty in selecting the best. AZtecWave can be used to measure and quantify light and trace elements in metals, which are more challenging to accurately quantify with EDS. This can be carried out alongside the analysis of major elements (via EDS, or WDS).