Leco CS744
16p-006
March 1, 2016
Leco CS744 - Oxygen/Nitrogen by Inert Gas Fusion Infrared and Thermal Conductivity Detection
The Leco CS744 is designed for routine measurement of carbon and sulfur in primary steels, ores, finished metals, and other inorganic materials. Additional features—such as a high-frequency combustion furnace, improved IR cell design, rugged design, and available automation assists in acquiring an accurate analysis of carbon and/or sulfur.
Request by Peter Hsieh
National Energy Technology Laboratory - NETL-Albany, 1450 Queen Ave. SW, Albany, Oregon.
Reference by Peter Hsieh
Trace amounts of carbon, sulfur, nitrogen, and oxygen can make a big difference in the structure and properties of many alloys. Combustion analysis can be used to measure the concentration of carbon and sulfur in a number of different ores and metals. A small amount of the sample is first combusted in oxygen. The amount of carbon
dioxide and sulfur dioxide produced from the reaction is then measured with an infrared detector.
A similar approach is applied to measure the amount of nitrogen and oxygen present in each sample. The sample is placed inside a graphite crucible and heated rapidly. Oxygen present in the molten sample reacts readily with the graphite crucible, and the amount of carbon dioxide formed from the combustion reaction is measured with an infrared detector and used to calculate the amount of oxygen originally present in the sample. Nitrogen gas escaping from the molten sample is measured with a separate thermal conductivity detector, as it is invisible to the infrared detector.
By measuring the composition of alloys down to parts-per-million levels, it is possible to work out how changes to ingredients and processing conditions affect their composition.
Leco CS744
16p-006
March 1, 2016
Leco CS744 - Oxygen/Nitrogen by Inert Gas Fusion Infrared and Thermal Conductivity Detection
The Leco CS744 is designed for routine measurement of carbon and sulfur in primary steels, ores, finished metals, and other inorganic materials. Additional features—such as a high-frequency combustion furnace, improved IR cell design, rugged design, and available automation assists in acquiring an accurate analysis of carbon and/or sulfur.
Request by Peter Hsieh
National Energy Technology Laboratory - NETL-Albany, 1450 Queen Ave. SW, Albany, Oregon.
Reference by Peter Hsieh
Trace amounts of carbon, sulfur, nitrogen, and oxygen can make a big difference in the structure and properties of many alloys. Combustion analysis can be used to measure the concentration of carbon and sulfur in a number of different ores and metals. A small amount of the sample is first combusted in oxygen. The amount of carbon
dioxide and sulfur dioxide produced from the reaction is then measured with an infrared detector.
A similar approach is applied to measure the amount of nitrogen and oxygen present in each sample. The sample is placed inside a graphite crucible and heated rapidly. Oxygen present in the molten sample reacts readily with the graphite crucible, and the amount of carbon dioxide formed from the combustion reaction is measured with an infrared detector and used to calculate the amount of oxygen originally present in the sample. Nitrogen gas escaping from the molten sample is measured with a separate thermal conductivity detector, as it is invisible to the infrared detector.
By measuring the composition of alloys down to parts-per-million levels, it is possible to work out how changes to ingredients and processing conditions affect their composition.