US 11,898,997 B2
Sample injector
Indranil Mitra, Benediktbeuern (DE)
Assigned to Roche Diagnostics Operations, Inc., Indianapolis, IN (US)
Filed by Roche Diagnostics Operations, Inc., Indianapolis, IN (US)
Filed on Aug. 3, 2021, as Appl. No. 17/444,330.
Claims priority of application No. 20193241 (EP), filed on Aug. 28, 2020.
Prior Publication US 2022/0065825 A1, Mar. 3, 2022
Int. Cl. G01N 30/20 (2006.01); G01N 30/22 (2006.01); G01N 30/32 (2006.01); G01N 30/02 (2006.01)
CPC G01N 30/20 (2013.01) [G01N 30/22 (2013.01); G01N 30/32 (2013.01); G01N 2030/027 (2013.01); G01N 2030/326 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A liquid chromatography (LC) system comprising:
an LC switching valve comprising a sample input port, an aspiration pump port, a needle seat port, a waste port, an LC pump port and an LC column port,
a sample aspiration needle fluidically connected to the sample input port via a sample receiving conduit,
an aspiration pump fluidically connected to the aspiration pump port for aspirating a sample via the sample aspiration needle when the sample aspiration needle is inserted into a sample container and when the aspiration pump port is connected to the sample input port,
a needle seat fluidically connected to the needle seat port via a needle seat conduit,
an LC column fluidically connected to the LC column port, and
an LC pump fluidically connected to the LC pump port, for injecting at least part of the sample aspirated in the sample receiving conduit into the LC column when the sample aspiration needle is seated into the needle seat and when the LC pump port is fluidically connected to the needle seat port and the sample input port is fluidically connected to the LC column port,
wherein in use of the LC system, the LC pump is configured to inject the at least part of the sample via the sample receiving conduit into the LC column such that the at least part of the sample is not injected into the LC column via the needle suit conduit when the sample aspiration needle is seated in the needle seat.