Patent ID: 11913917
Assignee: SHIMADZU CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 2:
3. The chromatograph according to claim 2, wherein for each analysis flow path:
the retention flow path includes an upstream retention flow path on a side of the state switch valve and a downstream retention flow path on a side of the needle,
the low-pressure flow path includes an upstream low-pressure flow path on a side of the measuring pump and the cleaning pump and a downstream low-pressure flow path on a side of the state switch valve, and
the sample injection further includes:
a switch apparatus that includes a switch unit, the switch unit being made up of a combination of the upstream retention flow path, the injection flow path, the state switch valve, and the downstream low-pressure flow path,
a first multi-way switch valve that is provided in a midway along the retention flow path and makes switching of the upstream retention flow path connected to the downstream retention flow path on a side of the downstream end of the retention flow path, and
a second multi-way switch valve that is provided in a midway along the low-pressure flow path and makes switching of the downstream low-pressure flow path connected to the upstream low-pressure flow path on a side of an upstream end of the low-pressure flow path.