Gas chromatography oven heaters
AssigneeStephen J. MacDonald
InventorsStephen J. MacDonald, Peter Germano, Edwin Jahngen
Life of this patent
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Abstract
A gas chromatography system with suspended tubular separation column(s) in an enclosed convection oven where a gas medium is heated by at least two electrically powered heaters. A kit to modify gas chromatographic ovens for operation with at least two electrically powered heaters. The heaters are positioned to promote even heating along the length of the column(s) and shielding of the column(s) from radiant heat. The heaters can provide faster heating rates at elevated temperatures.
Claims16
A method for improving the heating performance of a gad chromatography system having a separation column suspended in a gas medium in an enclodes convection oven wherein the gas medium is heated by a first electrically-powered gas heater in response to a temperature controller, said method comprisisng adding at least one second electrically-powered gas heater to said covection oven and means for mounting said heater wherein convective heat from said heater is directed to a circulating fan for distribution to said column and wherein said means provides shielding between said column and radiant heat from said heater.
A gas chromatography system comprising a tubular separation column suspended in a gas medium in enclosed convection oven wherein the gas medium is heated by at least two electrically-powered gas heaters and circulation in said oven by a fan, wherein each of said heater is mounted in said oven so that said column is shield from radiant heat transfer from said heaters.
A kit for improving the performence of a gas chromatography system havig a separation column suspended in a gas medium in an enclosed convection oven wherein the gas medium is heated by a first electrically-powered gas heater in response to a temperature controller and convective heat is directed to said column by a circulating fan, said kit comprising at least one second electrically-powered gas heater for said convention oven and means for mounting said second heater in said oven such that convective heat from said second heater is directed to said column by said circulating fan and such that said column is shielded from radiant heat from said second heater.
Dependencies are inferred from the claim text.