Determination of oxygen in solids using a modified carrier gas-hot extraction method

The nitrogen/oxygen-Analyzer TC-436 (LECO-Instruments) has been used to perform a two-step technique of the carrier gas-hot extraction method to avoid perturbations in the determination of bulk oxygen in solids. In the first step surface contaminations and organic admixtures are removed at 1000°C. The second step involves controlled heating-straight ramping or a simple impulse — to determine oxygen bound in oxides. The application of the method is shown by two example-chips of an FeBSi-alloy and powdered Si/Al2O3.