Shimadzu Corporation

Masaru Kozakura

Akioki Nakamori

Hiroaki Matsuhisa

Shingo Sumi

Hideyuki Miki

Hiroki Kaji

Sixu Li

A component analysis system includes a gas chromatograph having a separation column, and a component detector, the component detector including an oxidation-reduction furnace that has a first flow path through which a gas including a sample component separated by the separation column flows, and oxidizes and reduces the sample component in the gas flowing through the first flow path, a reaction cell that has an inlet for the gas including the reduced sample component and generates a chemical reaction accompanied by emission of light with respect to the sample component introduced from the inlet, a photodetector that detects light generated in the reaction cell, and a holding member that holds the oxidation-reduction furnace and the reaction cell, and a downstream end of the first flow path and the inlet of the reaction cell are directly connected or connected via a second flow path.

Gas chromatographic component analysis system and component detector including an oxidation-reduction furnace, reaction cell and photodetector

The gas chromatograph systemhas the gas chromatograph, and a detector. The detectorhas the redox unit. The redox unithas the reaction tube, the oxidation zoneand the reduction zone. The reduction zoneis disposed on the downstream side of the oxidation zone. The reduction zoneis disposed out of a position perpendicular direction above the oxidation zone. Hence, even if the air heated around the oxidation zonemoved upward by convection, the reduction zoneis prevented from being exposed to such hot air.

Gas chromatograph system

In a chemiluminescent analyzer for measuring a concentration of an object gas in a sample gas by mixing the sample gas with 5 a reaction gas and measuring light generated in a chemical reaction between the object gas and the reaction gas, the two gases flow through a double tube composed of an outer tube and an inner tube, and are mixed at the end of the tubes. The end of the inner tube is closed, and one or more outlets are provided at the side wall of the inner tube near the closed end. The flow of the gas coming out of the inner tube through the outlet or outlets crosses the flow of the gas in the outer tube, which enhances the mixture of the two gases and increases the chance of reaction between the object gas and the reaction gas. Since the flow of the mixed gas is directed toward the inner wall of the outer tube, the solid or liquid reaction product between the impurities in the sample gas and the reaction gas precipitates on the inner wall of the outer tube, not on a transparent glass plate separating the gases and the photometer for measuring the reaction emission (light).

Chemiluminescent analyzer

Relation of the degree of interference to interference concentration is previously stored with respect to at least one interference gas influencing an oxygen indicated value of a sample gas, so that interference corresponding to interference gas concentration of the sample gas is corrected on the basis of the stored relation when oxygen concentration is calculated from a detection signal of an oxygen sensor and outputted. Concentration of the interference gas, with respect to which the relation of the degree of interference is stored, is manually inputted in measurement, or previously set. When the concentration of the interference gas is previously set, such concentration is made changeable by manual input. Thus, even if the sample gas contains an interference gas in high concentration as in the case of an exhaust gas containing highly concentrated CO.sub.2 gas, it is possible to accurately measure oxygen concentration of the sample gas.

Growing community of inventors

Kyoto, Japan

Masaru Kozakura