Abstract
IT is reasonable that a gas chromatographic apparatus can be arranged in a circular form. Fig. 1 shows a chromatographic column connected head to tail. In operation, the carrier gas is brought to a desired initial pressure using the stopcock arrangement that is also utilized for sampling. The pump in the circuit is used to circulate the carrier gas previously introduced. Simple laboratory peristaltic-type pumps have been found satisfactory for circulating the gas stream. A bleed stream of carrier gas from a separate source is used in the reference side of a resistance-wire thermal-conductivity detector. The columns are packed with crushed insulating brick of conventional size. Temperature control is accomplished by either liquid or air baths.
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PORTER, R., JOHNSON, J. Circular Gas Chromatograph. Nature 183, 391–392 (1959). https://doi.org/10.1038/183391a0
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DOI: https://doi.org/10.1038/183391a0
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