Horiba, Ltd.

Tsutomu Oie

Ichiro Asano

Kenji Takeda

Hideki Koike

Satoshi Ohtsuki

The present invention enables the dissipation of thermal energy from a gas chromatography chamber containing a gas chromatography sample by providing the housing in two parts so that ambient air can be bled in during a creation of thermal energy with a heater and additional ambient air can be circulated in a cooling cycle. Additionally, a heat exchanger for receiving liquid nitrogen can also be included to increase the speed in which thermal energy can be dissipated.

Gas chromatography apparatus with temperature controlled chamber

A hydrocarbon analyzer for rapidly measuring both methane and nonmethane hydrocarbons is provided. The analyzer includes a nonmethane hydrocarbon absorbing first column connected in series with a methane absorbing second column. A sample gas is propelled in a carrier gas through a carrier gas line into the first and second columns via a change-over valve for switching between a branched line severably connected between the carrier gas line and a first flame ionization detector for measuring nonmethane hydrocarbons and a second flame ionization detector connected to the second column for measuring methane. The change-over valve switches from a gas sample introducing position to a backflush position so that the sample gas is introduced into the first nonmethane hydrocarbon absorbing column where the nonmethane hydrocarbons are absorbed and the methane is transferred to the second methane absorbing column prior to backflushing the carrier gas to elute the absorbed hydrocarbons which are directed to the first and second hydrogen flame ionization detectors.

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Miyanohigashi, Japan

Tsutomu Oie