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Potential type micro electrode sensor capable of being used for ion detection in settlings and application thereof

An ion detection and micro-electrode technology, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of high requirements on electrode mechanical strength, limited degree of resolution, cumbersome operation process, etc., to improve the electrode reaction performance and detection limit. Low, high mechanical strength effect

Active Publication Date: 2018-08-14
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages: (1) The disturbance effect cannot be avoided; (2) The operation process is cumbersome; (3) The degree of analysis is limited
[0007] In recent years, a low-detection-limit miniature polymer membrane ion-selective electrode that can detect micro-upgraded samples and has a sensitivity as high as picomolar has been born. Combined with solid contact electrode technology, this type of electrode has been successfully used in environmental monitoring and other fields; but , when measuring sediments, the mechanical strength of the electrode is required to be high, so there is an urgent need for a universal microelectrode suitable for measuring sediments

Method used

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  • Potential type micro electrode sensor capable of being used for ion detection in settlings and application thereof
  • Potential type micro electrode sensor capable of being used for ion detection in settlings and application thereof
  • Potential type micro electrode sensor capable of being used for ion detection in settlings and application thereof

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Embodiment 1

[0046] Take the detection of copper ions as an example. The specific detection steps are as follows:

[0047] 1. First use graphite-filled conductive silver glue to connect the carbon fiber to the copper wire, insert the gold wire connected to the end of the copper wire into the glass tube from the other end of the glass tube until the end of the gold wire is flush with the glass tube, and then connect it to the glass tube. The other end is filled with epoxy resin to fix the copper wire. Place one end of the glass tube that is flush with the gold wire on the outer flame of the alcohol lamp, and slowly rotate it. The glass tube will fuse with the gold wire and smooth it on sandpaper ( figure 1 , figure 2 ).

[0048] 2. Detect whether the electrode is good by cyclic voltammetry, the detection solution is 4mM K 4 [Fe 2 (CN) 6 ],1M KCl( image 3 ). If the electrode detection obtains the "S" curve in the figure, it indicates that the electrode performance is good and can be used for ...

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Abstract

The invention relates to a potential type micro electrode sensor, in particular to a potential type micro electrode sensor capable of being used for ion detection in settlings and application thereof.The potential type micro electrode sensor is a polymer film ion selective micro electrode, and consists of a gold micro electrode, a PEDOT (PSS) conduction layer and an iron selective polymer film; the iron selective polymer film is prepared by mixing ion selective carriers containing ions to be detected and lipophilic ion exchangers (quadri(3,5-bis(trichloromethyl)phenyl)sodium borate accordingto the mol ratio of (1:2)-(1:4) and then adding polyvinyl chloride and o-nitrophenyl octyl ether. The solid contact type micro electrode has the advantages that the manufacturing is simple and convenient; the sensitivity is high; the cost is low; the miniaturization is easy, and the like. Meanwhile, the micro electrode mass transfer speed is high; the current density is great; the response speed is high, and the like. The ion field in-site analysis in settlings can be realized; the detection on various ions in the settings can be realized through changing the types of ion carriers in the ion selective films.

Description

Technical field [0001] The invention relates to a potential type microelectrode sensor, in particular to a potential type microelectrode sensor which can be used for the detection of heavy metal ions in deposits and its application. Background technique [0002] Sediment is the source and sink of heavy metal pollution. After heavy metal enters the water body, it enters the sediment through absorption, flocculation and precipitation. Pore ​​water in marine sediments refers to the aqueous solution that occupies the pores between seabed sediment particles and rock particles. When the physical and chemical conditions (such as pH, Eh) change, heavy metals will dissolve into the pore water through the diffusion layer and enter the upper surface. Covering water bodies, causing secondary pollution. [0003] At present, the monitoring of heavy metals in domestic sediments, especially in-situ monitoring methods are very limited. Thin film balancing technology can achieve high-resolution de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/333
CPCG01N27/333
Inventor 丁家旺赵光涛秦伟
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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