Apparatus and method for detecting organic phosphorus pesticide

A technology for organophosphorus pesticides and portable detection, which is applied in measurement devices, material analysis by electromagnetic means, instruments, etc., can solve problems such as intuition, and achieve the effect of simple circuit, high integration and low energy consumption

Inactive Publication Date: 2013-08-28
JIANGSU UNIV
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Problems solved by technology

The display result of the instrument is the value of th

Method used

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  • Apparatus and method for detecting organic phosphorus pesticide
  • Apparatus and method for detecting organic phosphorus pesticide
  • Apparatus and method for detecting organic phosphorus pesticide

Examples

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Embodiment Construction

[0023] Such as figure 1 As shown, the signal conditioning circuit includes a current-voltage conversion circuit (chip model is OP07), a secondary amplifier circuit (chip model is INA129) and a low-pass filter circuit (chip model is LM324). The single-chip microcomputer controls the A / D conversion sampling, processes the obtained voltage signal, and displays the concentration of the liquid to be tested on the LCD display through the mathematical model between the concentration of the liquid to be tested and the detection signal. The LCD circuit model is 1602.

[0024] The detection device is designed with a single-chip microcomputer system. The low-power single-chip microcomputer is used as the core, the output of the signal conditioning circuit is connected with the analog-to-digital conversion pin of the single-chip microcomputer, and the liquid crystal display circuit is directly connected with the single-chip microcomputer. The voltage applied to the working electrode of ...

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Abstract

The present invention discloses a rapid and accurate method and an apparatus for detecting organic phosphorus pesticide, wherein a single-chip computer is adopted to control a temperature, and a silk-screen printing enzyme electrode is matched to carry out quantitative detection on organic phosphorus pesticide. The apparatus comprises an enzyme sensor, a portable detection device and a constant temperature control part, wherein acetylcholine esterase in the enzyme sensor is fixed on a working electrode of a nanometer composite material cadmium sulfide-graphene modified silk-screen printing electrode, the portable detection device comprises a signal conditioning circuit, a single-chip computer, a liquid crystal display circuit, a crystal oscillation circuit, a reset circuit, a key circuit and a conversion interface, and the constant temperature control part comprises a temperature sensor, a heater, a single-chip computer, a solid state relay, a digital tube, an indicating lamp and a keyboard. According to the present invention, the modularization technology is adopted, such that rapid on-site organic phosphorus pesticide detection can be achieved, operation is easy, carrying is easy, and a pesticide concentration can be rapidly and accurately detected.

Description

technical field [0001] The invention relates to a fast and accurate device and method for detecting organophosphorus pesticides, belonging to the technical field of detection instruments. Background technique [0002] Extensive use of organophosphorus pesticides not only causes environmental pollution, but also endangers human health. Many of these pesticides are highly toxic. Once they enter the human body, they will inhibit the activity of cholinesterase in the human body, affect the normal work of the central nervous system, and even cause death in severe cases. Therefore, people pay more and more attention to the detection methods and devices of organophosphorus pesticide residues. According to the chemical and physical characteristics of organophosphorus pesticides, there are three main analytical methods for the detection of organophosphorus pesticides, namely, Pope method, chromatography and enzyme inhibition method. The Pope method requires a special chromogenic re...

Claims

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Application Information

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IPC IPC(8): G01N27/327
Inventor 孙俊张梅霞李正明武小红方敏戴继生
Owner JIANGSU UNIV
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