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Automatic sampling device and method for washing needle thereof

An automatic sampling and needle technology, applied in sampling, instruments, scientific instruments, etc., can solve problems such as unsatisfied requirements

Active Publication Date: 2004-09-08
SHIMADZU SEISAKUSHO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In related art devices, such requirements are not met

Method used

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  • Automatic sampling device and method for washing needle thereof
  • Automatic sampling device and method for washing needle thereof
  • Automatic sampling device and method for washing needle thereof

Examples

Experimental program
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Effect test

Embodiment approach

[0025] (1) The composition of an embodiment of automatic sampler of the present invention

[0026] One embodiment of the autosampler of the present invention is described below. figure 1 is a schematic configuration diagram showing an embodiment of an automatic sampler. The first valve 11 constituted by a 7-way 6-position valve has 7 valve ports 11a-11g. The valve port 11 a is connected to a metering syringe 12 . The valve port 11 b is connected to the first cleaning liquid tank 13 , and the valve port 11 e is connected to the first cleaning tank 21 . The second valve constituted by a six-way valve has six valve ports 14a-14f for selectively connecting with adjacent valve ports by switching operation. The valve port 14a is connected with the liquid delivery pipe 15 for delivering the sample liquid to the test tube of the liquid chromatography analyzer, and the valve port 14b is connected with the liquid delivery tube 16 for delivering the mobile phase to the test tube. The...

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PUM

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Abstract

An automatic sampler comprises a first rinsing bath for rinsing the needle by soaking the needle in a rinsing liquid, in which the rinsing liquid is reserved, and a second rinsing bath for rinsing the needle by soaking the needle in a rinsing liquid, in which the rinsing liquid is exchanged during the rinsing operation. The first rinsing bath and the second rinsing bath are selectively employed for the purpose of use. That is, when a high rinsing power is required, such as when cross contamination is prevented, the second rinsing bath having higher rinsing power is employed. On the other hand, when the throughput is emphasized, the first rinsing bath is employed to rinse the needle in a shorter time.

Description

technical field [0001] The present invention relates to an automatic sample injection device (automatic sampler), which is used for introducing samples into a liquid chromatography analyzer; and also relates to a method, which is used for cleaning the needle of the automatic sampler. Background technique [0002] In liquid chromatography (LC), a predetermined amount of sample is introduced into a test tube using an autosampler. The sample injection operation using the automatic sampler includes: first, inserting a needle into a container in which a sample is placed, and drawing a predetermined amount of sample through the needle and containing it in a sample return tube or the like. Then, move the needle to the sample port connected to the test tube of the LC, and inject the absorbed sample into the sample port. [0003] When injecting a certain sample, if the residue of the sample used in the previous measurement adheres to the needle, it will cause measurement error due t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/24G01N1/00G01N30/18G01N30/20G01N35/10
CPCG01N35/1097Y10T436/114998G01N35/1004
Inventor 龙见信之
Owner SHIMADZU SEISAKUSHO CO LTD