Automatic sampler and probe using same

An automatic sampling and probe technology, applied in the field of liquid chromatography analysis, can solve problems such as cross-contamination

Inactive Publication Date: 2002-09-18
SHIMADZU SEISAKUSHO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, causing cross-contamination (although in some cases to a lesser extent)

Method used

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  • Automatic sampler and probe using same
  • Automatic sampler and probe using same
  • Automatic sampler and probe using same

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0021] Figure 1A and 1B Probes according to the first and second embodiments of the present invention are shown, respectively.

[0022] Figure 1A The probe 7 shown is a blunt probe with an outer diameter OD of 1.2 mm and an inner diameter ID of 0.5 mm, the outer diameter EOD of the blunt end being 0.65 mm. The base metal B is stainless steel, and the surface of the base metal B is coated with a platinum plating layer T with a thickness of several micrometers (μm). The surface of the probe is covered with a platinum coating T whose adsorption activity is much lower than that of stainless steel. Therefore, when probe 7 is used for Figure 4 With the autosampler shown, chemisorption on the probe 7 surface is constrained, which in turn reduces cross-contamination.

[0023] exist Figure 1B In the probe 7' shown, the base metal B is coated with a synthetic resin coating P (approximately 300 [mu]m thick) instead of metal plating as used in the first embodiment. The synthetic...

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PUM

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Abstract

The present invention discloses that the surface of a probe used to collect a sample is coated with a coating material that is less chemically reactive than the base metal of the probe. More specifically, the surface of the probe can be coated with a layer of gold or platinum. Alternatively, the surface of the probe can be coated with a coating with superior chemical resistance properties, such as a synthetic resin of polyetheretherketone. As a result, a practically sufficient antifouling effect can be obtained even in the case of contamination from chemical adsorption. Such contamination cannot be sufficiently removed only by measures to prevent physical contamination in the related art. Therefore, an autosampler that can perform highly sensitive analysis can be provided.

Description

technical field [0001] The invention relates to an automatic sampler and a probe of the automatic sampler, an analyzer used for liquid analysis, such as liquid chromatography analysis. More specifically, the probes are subjected to a surface treatment or coating, which reduces contamination of the probes by chemisorption. Background technique [0002] Figure 4 An example showing the main parts of an autosampler flow path configuration for liquid chromatography. [0003] exist Figure 4 In the shown autosampler, the plunger 3 is designed to reciprocate by mechanical force. Liquid samples to be analyzed are stored in a plurality of vials (small-capacity sample vials) 8 in advance. The vial 8 is set on the guide rail 81 . Probe 7 collects a sample from vial 8 . The probe 7 is connected to the injection valve 1 by an annular flexible conduit (hereinafter referred to as "loop") 6 . In addition, the probe 7 is actuated by an unshown drive mechanism...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N35/10B01L3/02G01N30/18G01N30/24G01N35/00
CPCB01L3/021G01N30/18G01N30/24G01N2035/00277
Inventor 龙见信之
Owner SHIMADZU SEISAKUSHO CO LTD
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