Liquid chromatograph analysis system
A liquid chromatograph, analysis system technology, applied in the direction of analysis materials, instruments, scientific instruments, etc., can solve problems such as user loss, adverse effects of analysis results, and confusion of mobile phase flow.
Pending Publication Date: 2021-10-22
SHIMADZU SEISAKUSHO CO LTD
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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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Embodiment Construction
[0020] Hereinafter, an embodiment of the liquid chromatograph analysis system of the present invention will be described with reference to the drawings.
[0021] Such as figure 1 As shown, a liquid chromatograph analysis system 1 (hereinafter referred to as analysis system 1 ) includes a liquid delivery system 2 , a sample injection unit 4 , a separation column 6 , a detector 8 and a control device 10 .
[0022] The liquid delivery system 2 includes a liquid delivery pump 14 for delivering the mobile phase in the analysis channel 12 and a pressure sensor 16 for detecting the delivery pressure of the liquid delivery pump 14 . also, figure 1 Although an example in which only one liquid-feeding pump 14 is provided is shown in , there may be a case where two or more liquid-feeding pumps are provided.
[0023] Although illustration is omitted, the liquid feeding pump 14 includes, for example, two plunger pumps that are driven complementary to each other and performs continuous li...
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A liquid chromatograph analysis system (1) of the present invention is provided with an analysis flow channel (12) that is connected to one or more liquid feeding pumps (14), and through which a liquid fed by the liquid feeding pumps (14) flows; a sample injection part (4) for injecting a sample into the analysis flow channel (12); a separation column (6) that is provided on the analysis flow channel (12) and is for separating the sample injected into the analysis flow channel (12) into components; a detector (8) that is provided on the analysis flow channel (12) and is for detecting the sample components separated in the separation column (6); a system configuration identification unit (26) that identifies, as a system configuration, the number of the liquid feeding pumps (14) connected to the analysis flow channel (12) and the connection structure thereof; a condition holding unit (18) that holds the conditions which are for detecting a liquid feeding failure in the liquid feeding pumps (14) and which are previously set for respective types of system configurations; a condition determination unit (20) configured to determine, from among the conditions held by the condition holding unit (18), a condition corresponding to the system configuration identified by the system configuration identification unit (26); and a liquid feeding failure detection unit (22) configured to detect a liquid feeding failure in the liquid feeding pumps (14) by using the condition determined by the condition determination unit (20).
Description
technical field [0001] The invention relates to a liquid chromatograph analysis system. Background technique [0002] In a liquid chromatograph, at least one liquid delivery pump is required to stably transport the mobile phase at a set flow rate in the analysis flow path. As the liquid delivery pump, a single-plunger pump including a single plunger pump and a double-plunger 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 and cause losses to users. Therefore, the following countermeasures are taken: suppress p...
Claims
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IPC IPC(8): G01N30/32G01N30/86
CPCG01N30/32G01N2030/326G01N30/8675G01N2030/027
Inventor 五味朋寛北林大介今村信也小川佳祐
Owner SHIMADZU SEISAKUSHO CO LTD