Patent ID: 11867669
Assignee: DIONEX SOFTRON GMBH
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A sampler for liquid chromatography, the sampler comprising:
(A) an injection valve, the injection valve includes:
a first port, a second port, a third port, a fourth port, and a fifth port, wherein
(i) the first port is configured to be connected to a pump;
(ii) the second port configured to be connected to a chromatography column;
(iii) the third port is connected to a sample loop;
(iv) the fourth port is configured to discharge fluid at a low pressure to waste; and
(v) a fifth port is connected to the sample loop;

(B) a sample delivery device connected to the sample loop;
(C) the sample loop connected to the injection valve, the sample loop including:
(a) a first sample loop part, in which a first end of the first sample loop part is connected to the fifth port and a second end of the first sample loop part is connected to the sample delivery device; and
(b) a second sample loop part, in which a first end of the second sample loop part is connected to the third port and a second end of the second sample loop part is connected to the sample delivery device,
in which the injection valve is configured to include a 1st position, a 2nd position, and an 3rd position,
(A1) in the 1st position of the injection valve, the first port and the second port are connected to one another such that this connection does not have a dead volume, and the third port and the fourth port are connected to one another;
(A2) in the 2nd position of the injection valve, the first port and the second port are connected to one another such that this connection does have the dead volume, and the third port and the fifth port both do not have a connection to either of the first port or the second port; and
(A3) in the 3rd position of the injection valve the first port and the fifth port are connected to one another, and the second port and the third port are connected to one another such that this connection does not have a dead volume.