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Magnet-based capillary electrophoresis electrochemical detection electrode locating device

A technology of capillary electrophoresis and detecting electrodes, which is applied in the direction of material electrochemical variables, etc., can solve the problems affecting the accuracy and precision of capillary electrophoresis analysis, the three-dimensional adjustable micromanipulator is large in size, and the positioning operation is complicated, achieving good application prospects , Simple structure, high integration effect

Inactive Publication Date: 2013-08-14
FUDAN UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

A three-dimensional adjustable micromanipulator is usually used to align the detection electrode with the capillary outlet. Due to the poor reproducibility of each manual adjustment, the accuracy and precision of capillary electrophoresis analysis are affected.
The three-dimensional adjustable micromanipulator has a large volume, low integration, poor seismic performance, complex and time-consuming positioning operation, and requires professional operators[3]

Method used

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  • Magnet-based capillary electrophoresis electrochemical detection electrode locating device
  • Magnet-based capillary electrophoresis electrochemical detection electrode locating device
  • Magnet-based capillary electrophoresis electrochemical detection electrode locating device

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Embodiment Construction

[0027] Further describe the present invention below by embodiment and accompanying drawing:

[0028] (1) Processing of electrode holder 14 containing magnet

[0029] The magnet 3 used to make the detection electrode positioning device can be an NdFeB magnet with a size of 20 mm × 10 mm × 2 mm. According to the size of the magnet 3, a plexiglass plate with a thickness of 1 mm is cut into small pieces by a CNC laser cutting machine, and bonded with an organic solvent such as chloroform to obtain an electrode holder 14. The external size is 32 mm × 24 mm × 4 mm, and the internal The size of the space is 25 mm × 20 mm × 2 mm, and the length and width of the internal space are required to be consistent with the length and thickness of the magnet 3. The bottom of the electrode holder is filled with two 1 mm thick plexiglass sheets to determine the height of the bottom edge of the magnet 3 from the bottom plate. 7 mm. Two square holes (2 mm × 4 mm) were processed on the top of the ...

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Abstract

The invention discloses a magnet-based capillary electrophoresis electrochemical detection electrode locating device and belongs to the technical field of capillary electrophoresis. The device comprises an electrode bracket containing a magnet, a detection electrode, a capillary, a detection pool, a capillary locating pipe, an electrode locating pipe, a screw rod and a micrometer head, wherein the micrometer head is fixed on a bottom plate through an installing sleeve, the outer diameter of the screw rod is the same as the diameter of a circular hole in the electrode bracket, and the top end of the screw rod is attached to the circular hole through the magnet and can rotate freely; the capillary locating pipe and the electrode locating pipe are respectively installed on two side walls of the detection pool and are concentrically aligned, the capillary is fixed in the locating pipe, the detection electrode is installed in the small hole of the electrode bracket and is aligned with the capillary after being inserted into the locating pipe, the electrode bracket drives the detection electrode to move back and forth by rotating a knob of the micrometer head so as to realize the precise adjustment on the space between an outlet of the capillary and the detection electrode.

Description

technical field [0001] The invention belongs to the technical field of capillary electrophoresis, in particular to a magnet-based capillary electrophoresis electrochemical detection electrode positioning device. Background technique [0002] Capillary electrophoresis is a high-efficiency liquid phase separation method that uses a high-voltage electric field as the driving force and uses a capillary as a separation channel to achieve separation and analysis based on the differences in mobility and distribution behavior between components in the sample. Since Joegenson and Luckas first proposed capillary electrophoresis in 1981 [1], this technology has attracted domestic and foreign analysis and life science due to its advantages of high efficiency, rapidity, high resolution, high sensitivity, less reagent consumption, low consumption and high integration. It has been widely concerned by relevant experts in the world, and has been widely used in biomedical research, food and d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
Inventor 陈刚干志彬张鲁雁
Owner FUDAN UNIV
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