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Liquid chromatograph

A liquid chromatography and chromatographic column technology, applied in the field of high-efficiency liquid chromatography, can solve problems such as high equipment cost and achieve the effect of increasing cost and cost

Inactive Publication Date: 2004-06-23
SHIMADZU SEISAKUSHO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] For the operator, the cumbersome problem is that it is necessary to manually open / close the discharge valve 19 to replace the mobile phase, so it is expected to automate the operation
However, in order to automatically open / close the discharge valve 19, a high torque motor is required due to the high pressure applied to the discharge valve 19, which results in high cost of equipment

Method used

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  • Liquid chromatograph
  • Liquid chromatograph
  • Liquid chromatograph

Examples

Experimental program
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Embodiment Construction

[0023] figure 2 is a block diagram showing a flow path of an embodiment of the present invention.

[0024] This embodiment includes a transfer pump part (a specific example of the supply part described in the present invention) 2 that supplies the mobile phase, an autosampler (depicted in the present invention) for introducing the sample into the flow path. A specific example of a sample introduction section) 4, a chromatography column 6 for separating samples, and a detection section 8 for sequentially detecting the separated samples.

[0025] The feed pump section 2 has a reciprocating feed pump 10 of the double plunger type. The suction side end of the main pump head 12 of the pump 10 is connected to the mobile phase container 16 storing the mobile phase through a check valve 14a, and the discharge side end is connected to the suction side of the secondary pump head 18 through a check valve 14b. side end. The discharge side end of the secondary pump head 18 is connected...

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Abstract

When a signal for filling up with or substituting a mobile phase is externally transmitted to a control part, the control part switches a valve for connecting a channel from a pump part to a sampling needle through a sampling loop and moves the sampling needle toward a drain port. Thus, a channel is formed through a mobile phase container->a pump->the valve->the sampling loop->the sampling needle->the drain port. In this channel state, the control part drives the pump at a high speed for substituting the channel connecting the pump and the sampling needle by a desired mobile phase.

Description

technical field [0001] The present invention relates to a chromatograph, such as a high performance liquid chromatograph, for separating and analyzing various compounds in a sample. Background technique [0002] figure 1 It is a flow path block diagram representing an ordinary high-efficiency liquid chromatography, which is composed of the following components: a chromatographic column 5 for separating samples; a transfer pump part 1 for supplying mobile phase to the column 5; an autosampler 3 for sampling from a sampling needle 39 Collect the sample and supply the sample to the sampling loop pipe 27 and introduce the collected sample into the mobile phase flow path upstream of the chromatographic column 5 (inlet front side) through a flow path switching valve 29; a detection part 7 is used to detect the sample separated in the column 5; and a control section 41 for controlling the operations of the delivery pump section 1 and the autosampler 3. [0003] The feed pump sect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/24G01N30/34
CPCG01N30/34G01N30/24
Inventor 北冈光夫
Owner SHIMADZU SEISAKUSHO CO LTD