Patent ID: 11898997
Assignee: ROCHE DIAGNOSTICS OPERATIONS, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. A liquid chromatography (LC) method involving the use of 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, the method comprising:
aspirating from a sample container a volume of sample via a sample aspiration needle into a sample receiving conduit fluidically connected to the sample input port by an aspiration pump fluidically connected to the aspiration pump port by connecting the aspiration pump port to the sample input port,
injecting at least part of the sample aspirated in the sample receiving conduit into an LC column fluidically connected to the LC column port by an LC pump fluidically connected to the LC pump port, by seating the sample aspiration needle into a needle seat fluidically connected to the needle seat port via a needle seat conduit, and by connecting the LC pump port to the needle seat port and the sample input port to the LC column port,
wherein injecting the at least part of the sample into the LC column by the LC pump comprises injecting 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.