The Application of Controlled Partial Gas Phase Thermolytic Dissociation to the Identification of Gas Chromatographic Effluents

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Abstract
Of the remaining problems in gas chromatography, the qualitative identification of components existing from a gas chromatographic unit is of major importance. A technique has been developed for gas chromatographic effluent identification. In the application of this technique, the peak selected for identification is transferred in a continuous flow system, from the primary gas chromatographic unit, through a tubular quartz pyrolysis reactor, and then through a second gas chromatograph for identification of the pyrolysis products. The pyrolysis patterns obtained are characteristic of the parent compound, independent of sample size and constant for the “standard” pyrolysis condition. Under these “standard” conditions, the pyrolysis product distribution may be treated in a manner analogous to the mass spectral ion distribution reported as a percentage of total ionization. The pyrolysis product distribution obtained using hexadecane as a test compound agreed very closely with the distribution predicted by the modified Rice free radical mechanism for thermal dissociation.

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