Abstract: In order to, in a chromatograph sampler, regulate the pressure of a sample fluid filled in a constant volume tube to be as constant as possible and ensure the reproducibility of measurement, the chromatograph sampler is configured to provide a bypass line between a sample introduction line and a sample discharge line in parallel with the constant volume tube, and when filling the sample fluid in the constant volume tube, flow the sample fluid also through the bypass line in parallel.

Abstract: In order to provide a gas chromatograph in which any adverse effects on a reduction reaction unit that are caused by the degradation of a reduction catalyst, and any adverse effects on an analyzing unit are prevented, a gas chromatograph is provided with: a column that, by causing a sample gas to pass through itself, is able to separate constituents for measurement that are contained in the sample gas; an oxidation reaction unit that uses an oxidizing gas to oxidize the sample gas that has passed through the column so as to create an oxidation sample gas; a reduction reaction unit that uses a reducing gas to reduce the oxidation sample gas created by the oxidation reaction unit so as to create an oxidation reduction sample gas; and an analyzing unit that analyzes the sample gas.

Abstract: In order to, in a chromatograph sampler, regulate the pressure of a sample fluid filled in a constant volume tube to be as constant as possible and ensure the reproducibility of measurement, the chromatograph sampler is configured to provide a bypass line between a sample introduction line and a sample discharge line in parallel with the constant volume tube, and when filling the sample fluid in the constant volume tube, flow the sample fluid also through the bypass line in parallel.

Abstract: In order to provide a gas chromatograph in which any adverse effects on a reduction reaction unit that are caused by the degradation of a reduction catalyst, and any adverse effects on an analyzing unit are prevented, a gas chromatograph is provided with: a column that, by causing a sample gas to pass through itself, is able to separate constituents for measurement that are contained in the sample gas; an oxidation reaction unit that uses an oxidizing gas to oxidize the sample gas that has passed through the column so as to create an oxidation sample gas; a reduction reaction unit that uses a reducing gas to reduce the oxidation sample gas created by the oxidation reaction unit so as to create an oxidation reduction sample gas; and an analyzing unit that analyzes the sample gas.

Abstract: The present invention is mainly intended to provide a reaction apparatus that can prevent a problem due to heat generated by heat treatment in a reaction part, and accurately perform detection, and the reaction apparatus is provided with: a reaction part that is introduced with sample gas having passed through a column and reaction gas, and as a result of a reaction between the sample gas and the reaction gas, produces measurement gas containing a predetermined compound; a protruding pipe that is integrally protruded from the reaction part; and a connecting part that is disposed separately from the reaction part and removably fitted with the protruding pipe.