Abstract：The content of oxygen in titanium-molybdenum alloy was determined by inert gas fusion-infrared absorption method. The optimal analytical conditions were selected: 0.06 g of sample was weighed in a 0.85 g nickel basket which was put in a graphite crucible for determination; the analytical power was controlled at 5.0 kW and analytical time was 40 s. Calibration curve was drawn by titanium certified reference material 501-657 with regression equation of y= 1.336 88x. The detection limit of oxygen was 0.000 22% by three times of blank standard deviation. The content of oxygen in two titanium-molybdenum alloy samples was determined by the proposed method. The relative standard deviation (RSD,n=11) was 2.0% and 3.3 %。 The standard addition recoveries for this method were between 95% and 103%.
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