Analytical Determination of Total Carbon and Sulphur in Solid Samples by Full Combustion and Integrated NDIR Detection

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In the framework of the chemical characterisation of low alloy steels, we carry out the analytical determination of C and S by total combustion, followed by a Non Dispersive Infra Red (NDIR) quantitative detection. Accurately weighed samples are fully oxidised under a controlled flow of pure oxygen passing through a tubular furnace heated up to 1350 °C. The combustion gases are filtered and dried by flowing through adequate chemical traps. Next, the gases pass along two detection chambers mounted in series where the IR absorbance of carbon dioxide (at  = 4.26 µm) and sulphur dioxide (at  = 7.3 µm) are measured and integrated with respect to time. The present report describes the detailed analytical procedures and the validation of the method. Several practical aspects related to the technique are being highlighted as well.


Original languageEnglish
PublisherSCK CEN
Number of pages31
Publication statusPublished - 2 Aug 2005

Publication series

NameSCK•CEN Reports
PublisherStudiecentrum voor Kernenergie


  • low alloy steel, carbon, sulphur, combustion, NDIR

ID: 89493