IMPROVED GAS CHROMATOGRAPHY METHODS AND APPARATUS

Gas chromatographic methods and apparatus are disclosed whereby improved separation times and efficiency are achieved by provision of a rapid transfer of heat or cooling from a heating or cooling source to a chromatographic column. The column (2) is provided within an insulating sheath. A resistance...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	RUBEY, WAYNE A
Format:	Patent
Sprache:	eng
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING
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Beschreibung
Zusammenfassung:	Gas chromatographic methods and apparatus are disclosed whereby improved separation times and efficiency are achieved by provision of a rapid transfer of heat or cooling from a heating or cooling source to a chromatographic column. The column (2) is provided within an insulating sheath. A resistance heating element (12) disposed in the sheath and optional heated or cooling gas flow through the sheath is capable of rapidly changing the temperature imparted to the column thereby.