Abstract：Titanium and its alloy have high solubility to gas elements. As protective gas, argon may dissolve in titanium materials during the preparation of titanium-based materials and exerted impact on their properties. A self-made nitrogen-removing device was configured onto an existing impulse thermal conductivity gas analyzer, which could realize nitrogen-removing efficiency over 97 %. Since the interference of nitrogen could be quantified and removed, accurate determination of argon in titanium was achieved. It was determined through nitrogen-removing thermal conductivity-programmed temperature method that argon in titanium could be completely released at 1 400 ℃ and argon existed in non-compound state. The determination results were consistent with those by chromatographic thermal conductivity method and time-of-flight mass spectrometry. The proposed method could provide as reference method in the establishment and perfection of the simultaneous determination of hydrogen, oxygen, nitrogen and argon by time-of-flight mass spectrometry.
