Carbon Determination in Ferrous Metals by Gas Chromatography.

Ferrous Metallurgy

“…Carbon analyses continue to be made by direct oxidation at high temperature; chromatographic methods and equipment for measuring the evolved carbon dioxide have come into widespread use in the past two years (133,206,226) and probably are second only to the vacuum emission direct reading spectrograph for this purpose. Thermal conductivity (127), infrared (217), and conductometric methods (175) are used to a lesser extent.…”

Gas chromatographic determination of carbon in fertilizer materials

“…One difficulty in their use is the need to introduce plug samples of gas into the chromatograph. Previous methods for achieving this involved collecting the oxidation products in liquid nitrogen traps (1-3) or on solid absorbents (4-7), or the use of rapid oxidation methods, e.g., high frequency induction furnaces (8)(9)(10)(11) or direct injection of liquid samples onto heated oxidants (12-15). These methods either add considerably to the analysis time, or to the cost of the equipment, or are unsuitable for fertilizer materials in which the carbonaceous matter can be largely water insoluble.…”

A Combustion-Gas Chromatographic Method for the Simultaneous Determination of Carbon and Sulfur in Ferrous Metals.

“…Gas chromatography is an excellent means of detection and is ideal for this type of analysis. However, only recently have the techniques involved in elemental analysis of organic compounds been extended to the determination of carbon in ferrous metals (11). The proposed simultaneous method utilizes gas chromatographic separation of the combustion products and detection by a thermal conductivity detector.…”