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High precision portable electrochemical detection terminal

A portable, high-precision technology, applied in the field of electrochemical detection, can solve the problems of weak anti-interference, low detection noise, and low detection accuracy of electrochemical detectors, and achieve strong stability and anti-interference, low noise, and test high precision effect

Active Publication Date: 2015-02-04
重庆联芯致康生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its working principle is: apply a constant potential between the two electrodes, and when the electroactive component passes through the electrode surface, a redox reaction (electrode reaction) occurs, and the magnitude of the electric quantity (Q) conforms to Faraday's law. Weak anti-interference, poor stability, low detection accuracy, large detection noise and low gain

Method used

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  • High precision portable electrochemical detection terminal
  • High precision portable electrochemical detection terminal
  • High precision portable electrochemical detection terminal

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Embodiment

[0025] Such as figure 1 , 3 As shown, this embodiment provides a high-precision portable electrochemical detection front-end. The detection front-end is suitable for portable electrochemical measurement equipment powered by a single power supply. Comparable to a workstation, it includes three circuits: forward voltage follower circuit, current-voltage conversion circuit, and three-ring to top crossover negative feedback amplifier. Through the design of three circuits, the circuit is greatly simplified. At the same time, with three-electrode WE electrode , The design of CE electrode and RE electrode improves the stability and anti-interference of the circuit, and also reduces the power consumption of the entire circuit.

[0026] In order to make those skilled in the art have a clearer understanding and understanding of the present invention, it will be described in detail below in conjunction with the accompanying drawings:

[0027] The positive voltage follower circuit inclu...

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Abstract

The invention discloses a high precision portable electrochemical detection terminal. In the prior art, the conventional electrochemical detector has the disadvantages of complicated structure, bad interference resistant performance, bade stability, and low detection precision, and the provided detection terminal solves the problems mentioned above. The detection terminal is characterized by comprising a forward voltage follower circuit, a RE electrode and CE electrode based on the forward voltage follower circuit, a current / voltage conversion circuit, a WE electrode based on the current / voltage conversion circuit, and a three-circle opposite vertex intersected negative feedback amplifier, which is connected to the current / voltage conversion circuit. The provided detection terminal has the advantages of simple circuit, good circuit stability, strong interference resistant property, low energy consumption, and high testing precision, and thus is suitable for promotion and application.

Description

technical field [0001] The invention belongs to the field of electrochemical detection, and in particular relates to a high-precision portable electrochemical detection front end. Background technique [0002] Electrochemical detectors measure the electrical signal changes of substances. For compounds with redox properties, such as organic compounds containing nitro and amino groups, and inorganic anions and cations, electrochemical detectors can be used. Includes polarographic, coulometric, amperometric, and conductivity detectors, among others. The first three are collectively referred to as voltammetry detectors, which are used for the detection of compounds with redox properties, and conductivity detectors are mainly used for ion detection. Its working principle is: apply a constant potential between the two electrodes, and when the electroactive component passes through the electrode surface, a redox reaction (electrode reaction) occurs, and the magnitude of the electr...

Claims

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Application Information

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IPC IPC(8): G01N27/26
Inventor 郭劲宏
Owner 重庆联芯致康生物科技有限公司
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