Gas Analysis Device, Fuel Gas Supply Mechanism, And Gas Analysis Method

Abstract: The present invention is a fuel gas supply mechanism for replacing a fuel gas cylinder without causing an accidental fire of hydrogen flame in a hydrogen flame ionization detection device, and comprises a first fuel gas port 51 to which a first fuel gas cylinder 10a is connected, a second fuel gas port 52 to which a second fuel gas cylinder 10b is connected, a first fuel gas flow passage 53 that connects the first fuel gas port 51 and an FID detector 4, a second fuel gas flow passage 54 that connects the second fuel gas port 52 and the FID detector 4, and a fuel gas backflow prevention mechanism 50 that prevents backflow from the first fuel gas flow passage 53 to the second fuel gas flow passage 54 or backflow from the second fuel gas flow passage 54 to the first fuel gas flow passage 53.

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