ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 8, Number 4
JKCSEZ 8(4)
August 20, 1964 

A new gas-chromatographic method for determining carbon and hydrogen in organic compounds has been developed. After sample combustion was performed in a regular analytical combustion tube with an internal oxidant(a mixture of silver oxide and manganese dioxide) under a helium flow, the water produced was converted to acetylene by passing through a calcium carbide tube. The carbon dioxide and acetylene were trapped by a molecular sieve 5A column at room temperature. The trapped gases were released under programmed temperature raise up to 340℃ and the released gases were passed through a silica gel column. The adsorption of CO2 and C2H2 in the molecular sieve 5A trapping column were found to be quantitative and the silica gel column showed an excellent resolution of CO2 and C2H2 for analytical purpose. The analytical results for various known compounds based on the out-put of the thermal conductivity cell calibrated for the amounts of carbon and hydrogen contents in benzoic acid, showed average errors ±0.5% and ±0.33% for carbon and hydrogen, respectively.