Development of titanium-based certified reference materials

The Institute for Certified Reference Materials (ICRM) issued for the first time certified reference materials (CRM 11777-2021) of the mass fraction of hydrogen, oxygen and nitrogen in titanium-based materials, i.e., titanium alloy 2V (ISO 1-1) and titanium VT 1-00 (ISO 1-2). The finished material is presented in the form of cylinders 2.5 mm in diameter and 5-6 mm height. The mass of a cylinder is about 0.1 g. To certify gas-forming elements, we used the methods of fusion under inert gas flow (hydrogen, oxygen, nitrogen) and high-temperature vacuum extraction with mass spectroscopy (hydrogen). The analyzers were calibrated using CRM, a gas dose (for hydrogen), and a substance of constant stoichiometric composition (potassium nitrate). Conditions for the determination of the mass fraction of hydrogen, oxygen, and nitrogen in titanium and titanium alloys using an ELTRA ONH-2000 gas analyzer in solid materials have been refined in the analytical laboratory ICRM. The accuracy indicators (assigned characteristics) of the measurement procedure were determined using a great bulk of experimental data. 

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