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Method and apparatus for capillary electrophoresis direct detection of substance in water-immiscible solution

A capillary electrophoresis, solution technology, applied in the field of analytical chemistry, can solve the problems of cumbersome, poor analysis reproducibility, time-consuming and so on

Inactive Publication Date: 2006-07-19
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these processes are time-consuming and cumbersome. In addition, due to sample volatilization and adsorption on the tube wall, the analysis reproducibility becomes poor.

Method used

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  • Method and apparatus for capillary electrophoresis direct detection of substance in water-immiscible solution
  • Method and apparatus for capillary electrophoresis direct detection of substance in water-immiscible solution
  • Method and apparatus for capillary electrophoresis direct detection of substance in water-immiscible solution

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Embodiment Construction

[0016] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0017] As shown in the figure, the online stripping-field amplification sampling device is mainly composed of a sample tube 4 and a capillary electrophoresis system. The sample tube 4 communicates with the buffer solution bottle 10 in the capillary electrophoresis system through the capillary 1. The water column 5 is packaged with a water-immiscible solution (the solution in the figure is formed by dissolving the sample 7 in the water-immiscible solvent 8), the separation capillary of the capillary electrophoresis system is located in the water column 5, and the anode 3 and the cathode 9 are respectively inserted into the sample In the water column 5 of the tube 4, in the buffer solution 2 in the buffer solution bottle 10.

[0018] When using this device to detect, the water-immiscible solution should be sealed in the sample tube with a section of...

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Abstract

The invention relates to a method and apparatus for using capillary electrophoresis to directly test the material of water-immiscible liquid. The apparatus is mainly formed by a sample pipe and a capillary electrophoresis system. The method adopts a section of water column to seal the water-immiscible solution in the sample pipe, adds sampling voltage, so that the sample extracted to the water column enters into the capillary column buffer solution and the tested material of the immiscible solution transfers to the water column to achieve online back extraction and field sampling to finish the directly test the material of water-immiscible liquid.

Description

technical field [0001] The invention relates to a method and a device for directly detecting substances in a water-immiscible solution by capillary electrophoresis, belonging to the field of analytical chemistry. The feature of this method is that it solves the problem of direct detection of substances in water-immiscible solutions by capillary electrophoresis, and can be easily combined with liquid-liquid extraction, liquid phase microextraction and other techniques to determine substances in complex biological matrices and environmental water samples. , which has the advantages of simplicity, rapidity and sensitivity. Background technique [0002] Capillary electrophoresis has the characteristics of high sensitivity, high resolution, rapidity, less sample consumption, and low cost. In recent years, it has been increasingly widely used in the fields of environment, biology, medicine, and food. However, these sample matrices are often complex and must be pretreated during a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/447
Inventor 曾昭睿方怀防
Owner WUHAN UNIV