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Miniature gas chromatographic column, gas chromatographic system and method for analysizing composition in sample

A gas chromatographic system and gas chromatographic column technology, which are applied in the directions of analysis materials, material separation, and measurement devices, and can solve the problems of insufficient length of micro-fabricated gas chromatographic columns.

Inactive Publication Date: 2003-05-21
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, prior techniques have not been successful with micro-GC columns for the analysis of certain liquid samples
The main reason is that microfabricated GC columns are not long enough to achieve the desired separation

Method used

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  • Miniature gas chromatographic column, gas chromatographic system and method for analysizing composition in sample
  • Miniature gas chromatographic column, gas chromatographic system and method for analysizing composition in sample
  • Miniature gas chromatographic column, gas chromatographic system and method for analysizing composition in sample

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Experimental program
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Embodiment approach

[0044] One objective of this particular embodiment is to obtain a type of micromachined gas chromatography column. Another object of this particular embodiment is to obtain a structure that is more compact than that of previous micro-machined gas chromatography columns.

[0045] In short, the micromachined gas chromatography column of this embodiment is manufactured by combining two or more layers together. The micro gas path is formed by etching on some layers and then covering it with other layers to create a complete capillary. Each layer has at least one function, either forming a groove or covering the groove to form a complete capillary, or both functions. In order to connect the adjacent ends of two capillaries in different layers, a through hole is formed in the layer between the two capillaries. In this way all the capillaries are connected together, creating a full-length capillary. The full-length capillary leads to the outside at both ends through through holes on the ...

Embodiment 1

[0050] In order to coat the capillary wall, traditional static or dynamic methods can be used. The traditional static method uses a stationary phase solution, such as SE-30 solution dissolved in chloroform, to fill the capillary, and then evaporate the solvent, leaving the stationary phase in the form of a deposit. The traditional dynamic method uses gas pressure to push some stationary phases of the solution through the capillary, and some stationary phases remain in the form of deposits. The new method of coating the capillary wall is to deposit a stationary phase on the corresponding areas of the gas path wall and the surface of the cover layer before bonding these layers together. Example 1. Drug testing

[0051] The substance extracted from human urine can be injected into the gas chromatography system as a sample. The components of the urine sample are separated by gas chromatography as described above, then detected by a detector, and reported to the user. If the provider o...

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Abstract

The invention refers to miniature gas-chromatograph field based on the micro-processing technique. It provides a gas-chromatograph column, including at least two cover layers and a gas-way layer, each layer material is compact, two sides of the gas-way layer both have micro-processed troughs, one side of the trough and the cover layer at least forms two capillaries, the capillaries are linked to form a complete one through the open hole in the gas-way layer, the complete capillary links to the exterior at two bottoms through the open holes of two most outer cover layers, one entrance and the other exit.

Description

Technical field [0001] The invention relates to the field of micro gas chromatography using micro processing technology. More specifically, the present invention provides a gas chromatography column in which at least two capillaries are formed by fine processing technology, and provides a gas chromatography system using the gas chromatography column, and a method for analyzing components in a sample using the system . Background of the invention [0002] Gas chromatography is an important part of modern analytical technology, which is widely used in organic matter analysis, chemical product quality monitoring, food testing, drug testing, environmental monitoring and other fields. The core is a gas chromatography column that plays a role of separation and analysis. Previous gas chromatographs were not portable due to their very large size. In the process of miniaturization of gas chromatography analytical instruments, the miniaturization of gas chromatography columns is a key. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/60
CPCG01N30/6095G01N30/6039G01N2030/025
Inventor 梁冬邢婉丽程京
Owner TSINGHUA UNIV
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