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Sample deposition device

a sample and deposition device technology, applied in the field of sample deposition devices, can solve the problems of reproducibility, affecting the quality of the sample, and affecting the dosing accuracy, so as to achieve the effect of compactness, reproducibility, and high degree of precision and reproducibility

Inactive Publication Date: 2010-02-18
CTC ANALYTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]With measuring instruments (detectors) becoming ever more sensitive, there is a need for sample deposition systems that are much better than conventional systems in terms of cross-contamination, reproducibility, speed and long life (robustness).

Problems solved by technology

Because of different degrees of expansion of the sample loop (for example caused by temperature or pressure fluctuations, etc.), this can have a negative impact on the dosing accuracy and the dosing reproducibility.
Apart from taking a long time, this also results in considerable wear of the parts.

Method used

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Embodiment Construction

[0006]With measuring instruments (detectors) becoming ever more sensitive, there is a need for sample deposition systems that are much better than conventional systems in terms of cross-contamination, reproducibility, speed and long life (robustness).

[0007]The devices according to the prior art have the disadvantage that the injection needle cannot be efficiently cleaned. Furthermore, cross-contamination of the sample material can only be partially avoided. Finally, the sample volume to be collected cannot be reproduced in an optimal manner.

[0008]Therefore, the object of the invention is to make available a device belonging to the technical field mentioned in the introduction and also a corresponding cleaning method, which device and method ensure the least possible cross-contamination with at the same time a high degree of accuracy, speed and long life.

[0009]The object is achieved by the features of claim 1. According to the invention, a connection for fluid of the second connectio...

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Abstract

A device for collecting a sample and for depositing the sample in a sample-receiving port of a measuring apparatus comprises a first connection element (8) with three connections for fluid, and a second connection element (7), and a hollow needle (5) for collecting and depositing the sample. A first feed line (9) for a first washing liquid is connected via a first pump to a first connection for fluid of the first connection element (8). A second feed line (10) for a second washing liquid is connected via a second pump to a second connection for fluid of the first connection element (8). A connection for fluid of the second connection element (7) is connected to the third connection for fluid of the first connection element (8), and the second connection element (7) is connected to a dosing device (1) and to the hollow needle (5). A valve (2) is arranged between the third connection for fluid of the first connection element (8) and the second connection element (7).

Description

TECHNICAL FIELD [0001]The invention relates to a device for collecting a sample and for depositing the sample in a sample-receiving port of a measuring apparatus, comprising a first connection element with three connections for fluid, and a second connection element, and a hollow needle (5) for collecting and depositing the sample, wherein a first feed line for a first washing liquid is connected via a first pump to a first connection for fluid of the first connection element, and a second feed line for a second washing liquid is connected via a second pump to a second connection for fluid of the first connection element.PRIOR ART [0002]The object of such a device (also referred to as sample deposition device, autosampler or sample deposition system) is to feed samples to a measuring arrangement such as a chromatograph.[0003]EP 0 651 255 A1 (Hoffmann La Roche) discloses an automatic pipetting device with a corresponding dosing and transport mechanism for the pipetting needle 11, whi...

Claims

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Application Information

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IPC IPC(8): B08B9/032G01N35/10G01N30/84B01L3/00
CPCG01N1/10G01N35/1097G01N35/1004G01N1/14B08B3/08B08B9/023B08B9/0325G01N30/02G01N2030/027
Inventor DOEBELIN, WERNERMAETZKE, THOMASVAN TILBURG, CHRIS C.E.
Owner CTC ANALYTICS
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