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Nitrite sensor

A nitrite and sensor technology, applied in the field of sensor measurement, can solve the problems of inability to detect online and consume reagents

Active Publication Date: 2017-02-22
东台城东科技创业园管理有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method cannot be detected online and requires reagent consumption

Method used

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0025] Such as figure 1 and figure 2 As shown, the electrode system of the nitrite sensor of this embodiment includes: electrode connection line 1, electrode mounting plate 2, reference electrode 3, auxiliary electrode 4, working electrode 5, common mode suppression electrode 6 and installation ring line 7, in The center of the electrode mounting plate 2 is provided with a through hole, and the installation ring 7 concentric with the center of the circle is provided with three through holes, and the reference electrode 3 is installed in the through hole at the center of the electrode mounting plate 2. The electrode 4, the working electrode 5 and the common mode suppression electrode 6 are respectively installed in the three through holes on the installation loop 7, the ...

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Abstract

The invention provides a nitrite sensor which comprises electrode connection wires, an electrode mounting disk, a reference electrode, an auxiliary electrode, a working electrode, a common-mode rejection electrode, an electrode excitation circuit, a control circuit, an electrode signal protection circuit and an electrode signal processing circuit, wherein the common-mode rejection electrode is additionally arranged in the sensor, so that a common-mode signal is generated; the electrode signal processing circuit is used for culling the common-mode signal to obtain a differential-mode signal generated by oxidization of nitrite; the differential-mode signal is amplified to acquire a voltage signal on a required level; finally, the amplified voltage signal is filtered and output. The nitrite sensor provided by the invention can be used for measuring nitrite and physically compensating changes of temperature and conductivity of a solution to be detected and interference of other ions in the solution on the sensor without software calculation, so that the measurement precision and stability are improved, and continuous on-line measurement on the concentration of nitrite in water can be carried out.

Description

technical field [0001] The invention belongs to the technical field of sensor measurement, in particular to a nitrite sensor. Background technique [0002] Nitrite is a general term for a class of inorganic compounds that widely exist in various water bodies and pickled products in nature and industrial production, such as groundwater, surface water, aquaculture ponds, drinking water, seawater, industrial wastewater, sausages, pickles Wait. It is often used as a food additive in industrial production to improve food taste, color and extend its shelf life. Nitrite is a toxic substance that is harmful to the human body and aquatic organisms. The nitrite sensor is a sensor that measures the concentration of its aqueous solution. When a stable excitation signal is applied to the nitrite ion selective electrode, the nitrite will undergo an oxidation reaction on the surface of the electrode, and the oxidation reaction will release electrons, and the electrode will collect these...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26
Inventor 赵德安赵怡龙孙月平赵宇艳
Owner 东台城东科技创业园管理有限公司
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