A coaxial positioning capillary electrophoresis-electrochemical integrated detection device

A capillary electrophoresis and coaxial positioning technology, applied in the field of electrophoresis and electrochemistry, can solve the problems of inefficiency and lack of reliability in the process, and achieve the effects of accurate results, easy replacement and processing, and high-precision coaxial positioning

Active Publication Date: 2017-08-01
ANHUI SCI & TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The device of this detection method is generally composed of a three-electrode system (working electrode, reference electrode, auxiliary electrode); the completion of the detection process depends on the manual three-dimensional adjustment instrument (f) to adjust the working surface ( a) Accurate alignment with the outlet end of the electrophoretic separation capillary with an inner diameter of less than 100 μm (d), the process is inefficient and lacks reliability

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  • A coaxial positioning capillary electrophoresis-electrochemical integrated detection device
  • A coaxial positioning capillary electrophoresis-electrochemical integrated detection device
  • A coaxial positioning capillary electrophoresis-electrochemical integrated detection device

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Embodiment Construction

[0037] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0038] Construction of the present invention and use process are as follows:

[0039] 1) Select two sections of thin-pore thick-walled glass tubes (aperture 360 ​​μm) with an inner diameter close to the outer diameter of the quartz capillary, stretch the quartz capillary through the two tubes naturally and make the front ends of the two tubes close to 0.5 mm, so that the two channels are coaxially aligned. The quartz capillary adopts the YN-025365 type (inner diameter 25 μm, outer diameter 365 μm, coating 25 μm) of Ruifeng Chromatography Device Co., Ltd. (Yongnian, Hebei). The polymer coating on the outer wall has certain toughness.

[0040] 2) Place the coaxially aligned two sections of thin-hole thick-walled glass tubes (microdisk electrode gu...

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Abstract

The invention discloses a coaxial positioning capillary electrophoresis-electrochemical integration detection device and relates to the technical field of electrophoresis-electrochemistry. The device comprises a coaxial positioning mechanism, an electrophoresis cathode and a three-electrode system, wherein the three-electrode system consists of a micro disc electrode, an auxiliary electrode and a reference electrode; and according to the coaxial positioning mechanism, a micro disc electrode guide pipe and a capillary tube guide pipe are surrounded and clamped by three rigid glass rods, so that pore channels of the two guide pipes are coaxially aligned, and internal pore channels of the two guide pipes are introduction channels of the micro disc electrode for electrochemical detection and a capillary tube for electrophoretic separation. The introduction channels of the capillary tube and the micro disc electrode for electrochemical detection are fixedly adhered by utilizing the surrounding glass rods, so that high-precision coaxial positioning is carried out, end-column emitter wall type capillary electrophoresis-electrochemical detection of to-be-detected mixed components can be rapidly performed, and a result is accurate and reliable.

Description

[0001] Technical field: [0002] The invention relates to the technical field of electrophoresis-electrochemistry, in particular to a coaxially positioned capillary electrophoresis-electrochemistry integrated detection device. [0003] Background technique: [0004] Capillary electrophoresis is a new type of liquid phase separation technology that uses a high-voltage direct current electric field as the driving force and a quartz capillary as the separation channel to achieve efficient separation based on the difference in mobility (including distribution behavior) between components in the sample. The inner surface of the quartz capillary used is SiO 2 Hydrate to form silanol (Si-OH), when the tube is filled with operating fluid with pH>3, the silanol will dissociate to form Si-O - . Therefore, the inner wall of the electrophoresis capillary has a lot of negative charges; while the operating fluid in the tube is positively charged to maintain the electrical neutrality of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/27
Inventor 朱金坤方艳夕陈俊明程年寿唐婧吕佩
Owner ANHUI SCI & TECH UNIV
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