Heating apparatus for a gas chromatograph, and heating method for a gas chromatograph

A heating apparatus for a gas chromatograph having a sample housed in a sample tube is heated for producing a vapor phase component, the vapor phase component being transported by a carrier gas from the sample tube to a detector, comprising:

• a temperature-elevating heating section for heating the sample;
• and
• an instantaneous heating section for heating and pyrolyzing the sample by heating a ferromagnetic material around the sample to a Curie point;
• the heating apparatus further comprising:
• a valve capable of switching between a first state in which a first port and an eighth port are communicated, a second port and a third port are communicated, a fourth port and a fifth port are communicated, and a sixth port and a seventh port are communicated, and a second state in which the first port and the second port are communicated, the third port and the fourth port are communicated, the fifth port and the sixth port are communicated, and the seventh port and the eighth port are communicated,
• a communicating passage between the second port and the sixth port, and
• a column between the fourth port and the eighth port;
• wherein in the first state, the vapor phase component that flows into the first port flows via the eighth port through the column and into the fourth port, and is fed to the detector via the fifth port, and a purge gas supplied from the third port flows via the second port through the communicating passage to the sixth port, and is discharged from the seventh port, and
• in the second state, the vapor phase component that flows into the first port flows via the second port through the communicating passage to the sixth port, and is fed to the detector via the fifth port, and the purge gas supplied from the third port flows via the fourth port through the column and flows into the eighth port, and is discharged from the seventh port.