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Injector with fluid supply and mobile phase discharge

A syringe and mobile phase technology, applied in the field of mobile phase, can solve problems such as human error, influence of chromatographic separation results, pressure and flow rate fluctuations or jumps, etc., to achieve the effect of suppressing artifacts, ensuring no interference, and ensuring sample separation

Pending Publication Date: 2020-05-26
AGILENT TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the process of introducing a fluid sample into the flow path between the fluid transmission device and the sample separation device according to the "supply injection" principle causes human errors such as pressure and flow rate fluctuations or jumps
This may undesirably affect chromatographic results

Method used

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  • Injector with fluid supply and mobile phase discharge
  • Injector with fluid supply and mobile phase discharge
  • Injector with fluid supply and mobile phase discharge

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Embodiment Construction

[0071] Before describing the exemplary embodiments of the invention in more detail with reference to the accompanying drawings, some basic considerations of the invention, on the basis of which the exemplary embodiments of the invention have been developed, should be described in general.

[0072] According to an exemplary embodiment, a syringe for a sample separation device is established which can be operated (preferably, but not necessarily, according to the "supply injection" principle) so that when a fluid sample or solvent is introduced into the main flow path Drain the mobile phase from the system, thereby increasing the freedom of separation results from disturbances. This can counteract excessive increases in flow when fluid samples and / or solvents are introduced. In this way, in particular, a fluid sample can be introduced into the main flow path without significantly disturbing the fluid flow in the main flow path outside the injector (wherein the injector may compr...

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Abstract

The invention relates to an injector (40) for injecting a fluid sample into a mobile phase in a sample separating device (10). The injector (40) has a main flow path (100) between a fluid drive (20) and a sample separating device (30), wherein the fluid drive (20) is designed to drive the mobile phase, and the sample separating device (30) is designed to separate the fluid sample injected into themobile phase. The injector also has a discharge device (104) for discharging a quantity of the mobile phase, in particular a specified quantity, out of the main flow path (100), and a supply device (102) for supplying a quantity, in particular a specified quantity, of the fluid sample and / or of a solvent to the main flow path (100), said discharged quantity and supplied quantity at least partly compensating for each other.

Description

technical field [0001] The present invention relates to a syringe, a sample separation device and a method for injecting a fluid sample into a mobile phase in a main flow path of a sample separation device. Background technique [0002] In high-performance liquid chromatography (HPLC), the liquid (mobile phase) is usually fed at a very precisely controlled flow rate (e.g., in the range of microliters to milliliters per minute) and high pressure (typically 20 to 1000 bars, currently Up to 2000 bar) moves through a stationary phase (eg a chromatographic column), at which high pressure the compressibility of the liquid is significant, so that the individual components of the sample liquid introduced into the mobile phase are separated from each other. Such an HPLC system is known, for example, from EP 0,309,596 B1 of the same applicant, Agilent Technologies AG. [0003] For liquid chromatography, it is necessary to introduce a sample of the fluid under study into the system. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/20
CPCG01N30/20G01N30/32G01N30/08G01N30/36G01N2030/201
Inventor 托马斯·欧特曼康斯坦丁·肖克特
Owner AGILENT TECH INC
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