Sample introduction device

A sample introduction device comprising:

• an insertion tube inserted into a head space of a sample container;
• a gas supply pipe that can communicate with the insertion tube and pressurizes the head space to a predetermined pressure by supplying gas into the sample container via the insertion tube;
• a collection unit that can communicate with the insertion tube and collects a component in gas derived from the head space;
• a discharge pipe that can communicate with the insertion tube via the collection unit;
• and
• a plurality of valves configured to perform switching between a pressurized state in which gas is supplied from the gas supply pipe to the insertion tube and a derivation state in which gas in the head space that is pressurized is derived from the insertion tube to the discharge pipe via the collection unit, wherein
• the plurality of valves includes a discharge valve that puts the insertion tube and the discharge pipe into a non-communication state in the pressurized state, and puts the insertion tube and the discharge pipe into a communication state in the derivation state, the sample introduction device further comprising:
• an additional channel for supplying gas to a channel formed by the gas supply pipe or a pipe that connects the gas supply pipe to the discharge pipe between the collection unit and the discharge valve in the derivation state, wherein
• the additional channel supplies gas to the channel between the collection unit and the discharge valve at a pressure lower than the predetermined pressure and higher than a pressure inside the discharge pipe, and
• the additional channel includes a resistance pipe branched from the gas supply pipe.

A sample introduction device comprising:

• an insertion tube inserted into a head space of a sample container;
• a gas supply pipe that can communicate with the insertion tube and pressurizes the head space to a predetermined pressure by supplying gas into the sample container via the insertion tube;
• a collection unit that can communicate with the insertion tube and collects a component in gas derived from the head space;
• a discharge pipe that can communicate with the insertion tube via the collection unit;
• and
• a plurality of valves configured to perform switching between a pressurized state in which gas is supplied from the gas supply pipe to the insertion tube and a derivation state in which gas in the head space that is pressurized is derived from the insertion tube to the discharge pipe via the collection unit, wherein
• the plurality of valves includes a discharge valve that puts the insertion tube and the discharge pipe into a non-communication state in the pressurized state, and puts the insertion tube and the discharge pipe into a communication state in the derivation state, the sample introduction device further comprising:
• an additional channel for supplying gas to a channel formed by the gas supply pipe or a pipe that connects the gas supply pipe to the discharge pipe between the collection unit and the discharge valve in the derivation state, wherein
• the additional channel supplies gas to the channel between the collection unit and the discharge valve at a pressure lower than the predetermined pressure and higher than a pressure inside the discharge pipe,
• the collection unit is arranged in a heating region, and
• the discharge valve is arranged outside the heating region.