System and method for component interconnection in HPLC

Patent metadata

Field	Value
Publication number	US-11280768-B2
Application number	US-201715809270-A
Country	US
Kind code	B2
Filing date	Nov 10, 2017
Priority date	Nov 10, 2016
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

A system for component interconnection for use in liquid chromatography includes a first switching valve and a second switching valve. A first connecting line fluidly connects the first switching valve to the second switching valve. A second connecting line fluidly connects the first switching valve to the second switching valve. A metering device is located in the first connecting line.

First claim

What is claimed is:

1. A system for interconnection of components for use in liquid chromatography comprising:
A) a first switching valve;
B) a second switching valve;
C) a first connecting line fluidly connecting the first switching valve to the second switching valve;
D) a second connecting line fluidly connecting the first switching valve to the second switching valve;
E) a metering device, wherein the first connecting line comprises the metering device; wherein the second switching valve is adapted to connect the metering device to at least one solvent reservoir via the first connecting line in a washing position; and
F) a trap column directly fluidically connected to two ports of the first switching valve;
wherein the first connecting line includes a first tube and a second tube, the first tube fluidly connecting the metering device to the first switching valve, the second tube fluidly connecting the metering device to the second switching valve;
wherein in a sample draw position, the second switching valve is adapted to connect the metering device with a first dead end via the second tube;
wherein in a pre-compressing position, the second switching valve is adapted to connect the metering device to the first dead end on the second switching valve via the second tube, and connect the metering device to a second dead end on the second switching valve via the second connecting line;
wherein in the pre-compressing position, the metering device is adapted to generate a positive pressure pre-compressing the trap column, wherein the trap column is fluidly connected via the first switching valve to the first connecting line and to the metering device; and
wherein the metering device is adapted to wash the components connected via the first switching valve and the second switching valve in the washing position during a sample analysis, wherein the components comprise a needle.

2. The system according to claim 1 further comprising:
G) a separation column, wherein in the washing position, the metering device is adapted to wash the trap column connected via the first switching valve during a sample analysis in the separation column.

3. The system according to claim 2 , wherein the system is adapted to be reloaded with a new sample via the metering device in a reload position during the sample analysis in the separation column.

4. The system according to claim 3 further comprising:
H) an analytical pump adapted to generate an analytical flow in the system;
I) the needle adapted to retrieve a sample,
J) a seat adapted to receive the needle; and
K) a waste reservoir,
wherein a second port of the first switching valve is directly fluidly connected to the seat and then to the first connecting line;
a third port and a fifth port both of the first switching valve are both directly fluidly connected to the trap column;
a fourth port of the first switching valve is directly fluidly connected to the separation column;
a first port of the first switching valve is directly fluidly connected to the analytical pump;
a sixth port of the first switching valve is directly fluidly connected to the second connecting line;
a seventh port of the second switching valve is directly fluidly connected to the waste reservoir;
an eighth port of the second switching valve is directly fluidly connected to the first solvent reservoir;
a ninth port of the second switching valve is directly fluidly connected to the first connecting line; and
a tenth port of the second switching valve is directly fluidly connected to the second connecting line.

5. The system according to claim 4 , wherein the second tube is fluidly connecting the metering device to the needle.

6. A system for interconnection of components for use in liquid chromatography comprising:
A) a first switching valve;
B) a second switching valve;
C) first connecting line fluidly connecting the first switching valve to the second switching valve;
D) a second connecting line fluidly connecting the first switching valve to the second switching valve; and
E) a metering device, wherein the first connecting line comprises the metering device; wherein the second switching valve is adapted to connect the metering device to at least one solvent reservoir via the first connecting line in a washing position, and
F) a trap column directly fluidically connected to two ports of the first switching valve;
wherein the metering device is adapted to wash the components connected via the first switching valve and the second switching valve in the washing position during a sample analysis, wherein the components comprise a needle; and
wherein in a pre-compressing position, the metering device is adapted to generate a positive pressure pre-compressing the trap column, wherein the trap column is fluidly connected via the first switching valve to the first connecting line and to the metering device.

7. The system according to claim 6 , wherein the first connecting line includes a first tube and a second tube, the first tube fluidly connecting the metering device to the first switching valve, the second tube fluidly connecting the metering device to the second switching valve.

8. The system according to claim 7 , wherein in a sample draw position, the second switching valve is adapted to connect the metering device with a first dead end via the second tube.

9. The system according to claim 8 , wherein in the sample draw position, the metering device is adapted to generate a negative pressure drawing in a sample.

10. The system according to claim 8 , wherein in a pre-compressing position, the second switching valve is adapted to
connect the metering device to the first dead end on the second switching valve via the second tube, and
connect the metering device to a second dead end on the second switching valve via the second connecting line.

11. The system according to claim 6 further comprising:
G) a separation column, wherein in the washing position, the metering device is adapted to wash the trap column connected via the first switching valve during a sample analysis in the separation column.

12. The system according to claim 11 , wherein the system is adapted to be reloaded with a new sample via the metering device in a reload position during the sample analysis in the separation column.

13. The system according to claim 12 further comprising:
H) an analytical pump adapted to generate an analytical flow in the system;
I) the needle adapted to retrieve a sample,
J) a seat adapted to receive the needle; and
K) a waste reservoir,
wherein a second port of the first switching valve is directly fluidly connected to the seat and then to the first connecting line;
a third port and a fifth port both of the first switching valve are both directly fluidly connected to the trap column;
a fourth port of the first switching valve is directly fluidly connected to the separation column;
a first port of the first switching valve is directly fluidly connected to the analytical pump;
a sixth port of the first switching valve is directly fluidly connected to the second connecting line;
a seventh port of the second switching valve is directly fluidly connected to the waste reservoir;
an eighth port of the second switching valve is directly fluidly connected to the first solvent reservoir;
a ninth port of the second switching valve is directly fluidly connected to the first connecting line; and
a tenth port of the second switching valve is directly fluidly connected to the second connecting line.

14. The system according to claim 13 , wherein the second tube is fluidly connecting the

Assignees

• Dionex Softron Gmbh

Inventors

• Wachinger Thomas
• Hollnagel Christoph

Classifications

• G01N30/468

  involving switching between different column configurations · CPC title

• G01N30/24

  Automatic injection systems · CPC title

• G01N2030/085

  using absorbing precolumn · CPC title

• G01N2030/027

  Liquid chromatography · CPC title

• G01N30/20 Primary

  using a sampling valve · CPC title