Determination of carbon, sulphur, nitrogen and oxygen using the Leco methods
When steels contain either high or low carbon and sulphur the LECO combustion method is the best chemical analysis method.
LECO analysis uses infrared absorption and thermal conductivity to measure combustion gases within a metallic sample. This process determines the presence and concentration of carbon, sulphur, oxygen and nitrogen. LECO analysis converts the elements from a sample into their oxidized form by utilizing either the gas fusion method (Nitrogen, and Oxygen) or the combustion method (Carbon and Sulphur).
MSL has a LECO CS-344 for carbon and sulphur and a LECO TC-136 for nitrogen and oxygen.