The Effect of Calibration with Different Matrix Reference Materials on the Accuracy of Oxygen Determination by Inert Gas Fusion-Infrared Absorptiometry

Abstract The inert gas fusion-infrared absorptiometry is an effective means of determination of oxygen. The results need to be calibrated with reference materials (RMs), which is required to have the similar composition as the samples. However, due to the limited types of RMs on the market, currently, calibration with different matrix is widely used in the determination of oxygen of various materials. In this study, oxygen content was measured in 17 types of materials, including steels, metal oxides, non-metallic compounds, organic compounds, and oxygen-containing salts. The accuracy of oxygen determination was analyzed, and it was concluded that steel and iron oxide are effective RMs for low and high oxygen determination, respectively. It provides the experimental basis for the application of calibration with different matrix RMs to the determination of oxygen by inert gas fusion-infrared absorptiometry.