All solid-state ion selective electrode and preparation method and application thereof

An ion-selective electrode and ion-selective technology, applied in the field of biological and non-biological detection, can solve the problems of difficult maintenance and cleaning, unstable electrode measurement, and narrow temperature adaptability, and achieve wide temperature adaptability, stable measurement, and external interference. less effect

Active Publication Date: 2013-10-02
NANJING PERLONG MEDICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional ion-selective electrode is filled with liquid, has a short service life, unstable electrode measurement, narrow temperature adaptability, and is not easy to maintain and clean, etc.

Method used

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  • All solid-state ion selective electrode and preparation method and application thereof
  • All solid-state ion selective electrode and preparation method and application thereof
  • All solid-state ion selective electrode and preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0023] An all-solid-state ion-selective electrode, comprising an electrode cap 1 and an electrode core 2, the lower part of the electrode core 2 is covered with a conductive polymer layer 3, and the surface of the conductive polymer layer 3 is covered with a layer of ion-selective membrane 4, the conductive The polymer layer 3 contains conductive polymers and lipophilic additives, and the thickness of the ion-selective membrane 4 is 0.5-2 mm. The electrode cap 1 is a mushroom-shaped electrode cap. The electrode cap 1 is an electrode cap formed by closely connecting a gold-plated surface with a silver wire. The thickness of the conductive polymer layer 3 is 10 μm, and the resistance of the conductive polymer layer 3 is 1*10 6 ohm. The conductive polymer is polythiophene. The lipophilic additives are n-butyl acrylate and methyl methacrylate, and the molar ratio of n-butyl acrylate and methyl methacrylate is 80:20. The ion-selective membrane 4 is polyvinyl chloride, co-polyvi...

Embodiment 2

[0030] Basically the same as Example 1, the difference is that the thickness of the conductive polymer layer 3 is 20 μm, and the resistance of the conductive polymer layer 3 is 5*10 6 ohm. The oxidizing agent is 10% perchloric acid. The conductive polymer is polyphenol. The lipophilic additives are n-butyl acrylate and methyl methacrylate, and the molar ratio of n-butyl acrylate and methyl methacrylate is 95:5. The ion-selective membrane 4 is polyvinyl chloride, co-polyvinyl acetate and poly-vinyl alcohol, and the ratio of polyvinyl chloride:co-poly-vinyl acetate:poly-vinyl alcohol is 1:3:6.

[0031] The preparation method of the above-mentioned all-solid-state ion-selective electrode comprises the following steps:

[0032] 1) Preparation of conductive polymer copolymer solution: phenol solution with a volume concentration of 0.01% and an oxidant with a volume concentration of 10% are mixed to obtain a conductive polymer solid-water mixture, and the lipophilic additive and ...

Embodiment 3

[0037] Basically the same as Example 1, the difference is that the thickness of the conductive polymer layer 3 is 15 μm, and the resistance of the conductive polymer layer 3 is 3*10 6 ohm. The oxidizing agent is 6% hypochlorous acid. The conductive polymer is polypyrrole. The lipophilic additives are n-butyl acrylate and methyl methacrylate, and the molar ratio of n-butyl acrylate and methyl methacrylate is 60:40. The ion selective membrane 4 is polyvinyl chloride, co-polyvinyl acetate and poly-vinyl alcohol, and the ratio of polyvinyl chloride:co-poly-vinyl acetate:poly-vinyl alcohol is 1:2:4.

[0038] A method for preparing an all-solid-state ion-selective electrode, comprising the steps of:

[0039] 1) Preparation of conductive polymer copolymer solution: acetylene solution with a volume concentration of 0.005% and an oxidant with a volume concentration of 6% are mixed to obtain a conductive polymer solid-water mixture, and the lipophilic additive and conductive polymer ...

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Abstract

The invention discloses an all solid-state ion selective electrode comprising an electrode cap and an electrode core, wherein a conductive polymer layer covers the lower part of the electrode core, a layer of ion selective membrane covers the surface of the conductive polymer layer, the conductive polymer layer contains a conductive polymer and a lipophilic additive, and the thickness of the ion selective membrane is 0.5-2mm. The invention also discloses a preparation method and an application of the all solid-state ion selective electrode. The all solid-state ion selective electrode disclosed by the invention can contain such additional polymers suitable for biological sensors as polyvinyl chloride, polyurethane or silicone rubber and lipophilic or hydrophilic additives. The conductive polymer can bring stable potential performance and wide temperature adaptability. Compared with the traditional ion selective electrode, the all solid-state ion selective electrode has the advantages of no internal filling liquid, long service life, stable electrode measurement, wide temperature adaptability, less external disturbance, easiness and convenience for use, non-maintenance, etc.

Description

technical field [0001] The invention relates to the field of biological and non-biological detection, in particular to an all-solid ion selective electrode and its preparation method and application. Background technique [0002] Ion-selective electrodes (ISEs) are widely used to measure ion concentrations in various biological and abiotic fluids. The ions to be measured are in fluids ranging in complexity from fluoride in drinking water (a relatively simple solution) to electrolytes in blood (a substantially more complex solution). Typically in biological solutions, sensors containing multiple ion-selective electrodes are used to measure multiple ions in a single sample. [0003] Typically, an ion-selective electrode consists of an ion-selective membrane, a conductive polymer, and contacts. The internal reference electrode is contained within the ion selective electrode assembly and typically consists of a silver / silver chloride electrode which is in contact with a suitab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/333
Inventor 孙俊淳林刘金虎
Owner NANJING PERLONG MEDICAL EQUIP
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