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Ph selectivity micro-electrode and preparing method thereof

A selective, micro-electrode technology, applied in the direction of material electrochemical variables, material analysis by electromagnetic means, measuring devices, etc., can solve the problems of lack of testing methods and dwelling in the study of pH changes, and achieve fine tip and small volume , Optimize the effect of the treatment process

Inactive Publication Date: 2009-05-20
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Claims
  • Application Information

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Problems solved by technology

For a long time, due to the lack of suitable tools, people's pH measurement in the microscopic area has remained on a macro basis, and the research on the change of pH in the microscopic area lacks corresponding testing methods

Method used

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  • Ph selectivity micro-electrode and preparing method thereof
  • Ph selectivity micro-electrode and preparing method thereof

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Embodiment Construction

[0016] see figure 1 , the pH selective microelectrode of the present invention comprises a tapered outer casing 1, Ag / AgCl wire 3 is installed in this glass tube, and the tip of the tapered outer casing 1 is injected with a hydrogen ion selective liquid film 5, The cavity of the tapered outer sheath 1 is filled with post-membrane electrolyte 2; epoxy resin 4 is used to fix the Ag / AgCl wire and the outer glass sheath.

[0017] The tapered outer sleeve 1 is a single-layer tube, and the length of the tip is 1-10 μm.

[0018] Electrolyte 2 after the membrane is composed of 0.04mol / L KH 2 PO 4 , 0.023mol / L NaOH, 0.015mol / L NaCl composition (pH adjusted to 7).

[0019] The pH selective microelectrode has a linear response range of pH=4-10 and a slope of -59.945mV / pH. The electrode response time is short, generally less than 5s, small in size, easy to manufacture, and low in price.

[0020] A preparation method for a pH-selective microelectrode, comprising the following steps: ...

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Abstract

The invention discloses a pH selective microelectrode and a preparation method thereof. The pH selective microelectrode comprises a conical glass bushing, an after-membrane electrolyte is filled in a cavity of the conical glass bushing, a tip part of the conical glass bushing is injected with a hydrogen ion selective liquid membrane, an Ag / AgCl wire is arranged in the conical glass bushing, and an epoxy resin is used to fix the Ag / AgCl wire and seal the conical glass bushing at a mouth part of the conical glass bushing. The diameter of the tip of the pH selective microelectrode is between 1 and 10mu m, the linear response range, namely the pH value is between 4 and 10, and the slope is -59.945mV / pH. The response time of the microelectrode is short and is generally less than 5s, and the pH selective microelectrode has the advantages of small volume, simple production and low cost.

Description

technical field [0001] The invention relates to a microelectrode and its preparation, in particular to a pH selective microelectrode and its preparation method. technical background [0002] Severe environmental pollution has made sewage treatment more and more important. Nitrogen removal is an important part of sewage treatment, and pH has an important impact on nitrification and denitrification. Therefore, the discussion of denitrification mechanism and process optimization are inseparable from the measurement of pH. For a long time, due to the lack of suitable tools, people's pH measurement in the microscopic area has remained on a macro basis, and the research on the change of pH in the microscopic area lacks corresponding testing methods. Contents of the invention [0003] In view of the defects or deficiencies in the above-mentioned prior art, the object of the present invention is to provide a pH-selective microelectrode and a production method thereof. The pH-selec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/333G01N27/36
Inventor 王旭东王磊杨永哲张立卿崔星王韬李志霞许维孟千秋白晓荣佐藤久福士宪一
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY