Nitrate radical ionic selectivity micro-electrode and preparing method thereof

A nitrate ion and selective technology, which is applied in the direction of material analysis, measuring devices, instruments, etc. by electromagnetic means, can solve the problems of lack of testing means for the change of nitrate ions and the retention of nitrate ions, etc., and achieve small size and optimization The effect of the treatment process

Inactive Publication Date: 2009-05-27
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

For a long time, due to the lack of suitable tools, the determination of nitrate ions has remained on a macro ba

Method used

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  • Nitrate radical ionic selectivity micro-electrode and preparing method thereof
  • Nitrate radical ionic selectivity micro-electrode and preparing method thereof

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Embodiment Construction

[0017] see figure 1 , the nitrate ion selective microelectrode of the present invention comprises a tapered glass casing 1, is filled with membrane back electrolyte 2 in the cavity of tapered glass casing 1, and the tip portion of tapered glass casing 1 is injected with Nitrate ion selective liquid membrane 5, Ag / AgCl wire 3 is installed in tapered glass casing 1, Ag / AgCl wire 3 and sealing tapered glass are fixed with epoxy resin 4 at the mouth of tapered glass casing 1 Casing 1.

[0018] The tapered glass sleeve 1 is a single-layer tube, and the length of the tip is 1-10 μm.

[0019] Electrolyte 2 behind the membrane is composed of 50mmol / L KNO 3 And 50mmol / L KCl composition.

[0020] The fabricated nitrate ion selective microelectrode has a tip of 1-10 μm and a linear response range of 10 -1 ~10 -5 M, the slope is 57.647mV / -log[NO 3 - ], the detection limit is 1×10 -5 M. The electrode response time is short, generally less than 5s, small in size, easy to manufactur...

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Abstract

The invention discloses a nitrate ion selective microelectrode and the making method thereof. The nitrate ion selective microelectrode comprises a conical glass sleeve, and is characterized in that the cavity of the conical glass sleeve is filled with post-film electrolyte, the tip portion of the conical glass sleeve is filled with nitrate ion selective liquid film, Ag/AgCl filament is arranged in the conical glass sleeve, and at the mouth of the conical glass sleeve, epoxy resin is used to fixing the Ag/AgCl filament and sealing the conical glass sleeve. The size of the tip portion of the nitrate ion selective microelectrode is 1-10mum, the linear response ranges from 10<-1> to 10<-5>M, the gradient is 57.647mV/-log[NO3-], and the detection lower limit is 1*10<-5>M. The response time of the electrode is short and generally less than 5s, moreover, the nitrate ion selective microelectrode is small in size and simple to manufacture at a low cost.

Description

technical field [0001] The invention relates to a microelectrode and its preparation, in particular to a nitrate ion selective separation microelectrode and its preparation method. technical background [0002] Severe environmental pollution has made sewage treatment more and more important. As an important part of sewage treatment, denitrification is inseparable from the determination of nitrate ions for its mechanism discussion and process optimization. For a long time, due to the lack of suitable tools, the determination of nitrate ions has remained on a macro basis, and the research on the changes of nitrate ions in the microscopic area lacks corresponding testing methods. Contents of the invention [0003] For the defects or deficiencies in the above-mentioned prior art, the object of the present invention is to provide a nitrate ion selective microelectrode and a preparation method thereof, and the nitrate ion selective separation microelectrode made by the present i...

Claims

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Application Information

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IPC IPC(8): G01N27/333
Inventor 王磊王旭东杨永哲张立卿李志霞王韬孟千秋崔星许维白晓荣佐藤久福士宪一
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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