Liquid feeding system for liquid chromatography

A liquid chromatograph and liquid delivery technology, which is applied in the field of liquid delivery system, can solve problems such as adverse effects on analysis results, user loss, mobile phase flow confusion, etc., and achieve the effect of high-precision liquid delivery.

Active Publication Date: 2021-10-22
SHIMADZU SEISAKUSHO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If pulsation occurs, the flow rate of the mobile phase will be disordered, which will adversely affect the analysis results and cause user losses

Method used

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  • Liquid feeding system for liquid chromatography
  • Liquid feeding system for liquid chromatography
  • Liquid feeding system for liquid chromatography

Examples

Experimental program
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Effect test

Embodiment Construction

[0023] Hereinafter, an embodiment of the liquid delivery system for a liquid chromatograph of the present invention will be described with reference to the drawings.

[0024] Such as figure 1 As shown, the liquid chromatograph includes a liquid delivery system 2 , a sample injection part 4 , a separation column 6 , a detector 8 and a control device 10 .

[0025] The liquid delivery system 2 of the embodiment includes two liquid delivery pumps 14A and 14B, and the two liquid delivery pumps 14A and 14B operate independently of each other, and deliver the mobile phase in the common flow path 12 . A pressure sensor 16A and a pressure sensor 16B are provided at the rear stage of each liquid-feeding pump 14A and 14B, and the liquid-feeding pressure of the mobile phase flowing in the channel 12 is detected by the pressure sensor 16A and the pressure sensor 16B. In addition, although two pressure sensors 16A and 16B are provided here, only any one may be provided. The solvents sent ...

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PUM

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Abstract

A liquid feeding system (2, 2') is provided with a plurality of liquid feeding pumps (14A, 14B) which operate independently of each other and feed a liquid as a mobile phase through a common flow channel (12); pressure sensors (16A, 16B) for detecting the pressure of the liquid being fed in the flow channel (12); and a liquid feeding failure detection unit (20, 28) that is configured to cyclically obtain the pressure of the liquid being fed, detected by the pressure sensors (16A, 16B), and to detect, through detection of variation in the pressure of the liquid being fed in relation to the respective drive cycles of the plurality of liquid feeding pumps (14A, 14B), failure in liquid feeding by either of the plurality of liquid feeding pumps (14A, 14B).

Description

technical field [0001] The invention relates to a liquid delivery system for continuously transporting mobile phase in a liquid chromatograph analysis system. Background technique [0002] A liquid delivery system for a liquid chromatograph is required to stably deliver a solvent used as a mobile phase at a set flow rate. As the liquid-feeding pump used in the liquid-feeding system, a single-plunger pump including a single plunger pump and a double-plunger type pump including two plunger pumps are used. [0003] When the plunger pump discharges the solvent, the compression of the solvent, the leakage of the check valve, the mixing of fine air bubbles into the flow path, the depletion of the solvent, etc. cause the pressure of the liquid to be lowered, thereby causing a so-called pulsation. When the hydraulic pressure fluctuates greatly periodically. If pulsation occurs, the flow rate of the mobile phase will be disturbed, which will adversely affect the analysis results an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/32
CPCG01N30/32G01N2030/027G01N2030/326
Inventor 五味朋寛
Owner SHIMADZU SEISAKUSHO CO LTD
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