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Sample holder device for an atomization furnace, and manufacturing method

An atomization furnace and sample technology, applied in the direction of material excitation analysis, thermal excitation analysis, etc., can solve the problems of adhesive disappearance, embrittlement, sample carrier rupture, etc.

Inactive Publication Date: 2019-05-21
SCHUNK KOHLENSTEOFFTECHNIK GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This apparently leads to the disappearance or embrittlement of the binder within the furnace graphite material and thus to the rupture of the sample carrier, for example after 400 measurement cycles

Method used

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Examples

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Embodiment Construction

[0008] In the method according to the invention for producing a sample carrier for an atomization furnace, in particular for atomic absorption spectroscopy, the sample carrier has a receiving tube which forms a tubular receiving space for receiving an analyte, The sample carrier is made entirely of graphite, where the graphite of the sample carrier is infiltrated with pyrolytic carbon.

[0009] When producing electric furnace graphite, powdered carbon material is pressed into shaped parts by means of so-called binders, which are then graphitized. The binder adheres to the particles of EAF graphite and connects the particles. During the temperature treatment of the electric furnace graphite, the binder is converted into carbon and forms so-called binder bridges between the particles. It has been found that especially in the case of sample supports, the high-resistance binder bridges of electric furnace graphite are subjected to high loads, which can lead to microsublimation of...

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Abstract

The invention relates to a method for manufacturing a sample holder device for an atomization furnace, in particular for atomic absorption spectrometry, as well as to a sample holder device which includes a reception tube forming a tubular reception chamber for accommodating an analyte, said sample holder device being made entirely of graphite which is infiltrated with pyrolytic carbon.

Description

technical field [0001] The invention relates to a sample carrier for an atomization furnace of an analytical device and an analytical device, in particular for atomic absorption spectrometry, and to a method for producing a sample carrier having a receiving tube, which forms a tubular receiving space for receiving the analyte, wherein the sample carrier is made entirely of graphite. Background technique [0002] Atomization furnaces for atomic absorption spectroscopy (AAS), in particular for graphite furnace atomic absorption spectroscopy (GF-AAS), are well known, in which a graphite furnace or graphite tube is electrothermally heated to Nebulize analytes. Graphite furnace or tube furnace devices generally have a sample carrier with a receiving space that is tubular in shape. In the tubular receiving space, the analyte can be nebulized directly in the receiving space or, for example, on a disk-shaped platform in the receiving space. For spectroscopic analysis, the longitu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/74
CPCG01N21/74
Inventor 拉尔夫·盖特纳斯特芬·韦勒因卡·施瓦兹
Owner SCHUNK KOHLENSTEOFFTECHNIK GMBH