Rapid detection system for lead in soil

A detection system and element technology, applied in the field of detection systems, can solve the problems of difficulty in meeting the prediction and early warning of environmental pollution in agricultural production areas, difficulty in rapid detection of lead elements in soil, and high price, and achieve low power consumption, low cost, and good repeatability. Effect

Inactive Publication Date: 2018-01-30
张桂春
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Problems solved by technology

However, the current electrochemical workstation is expensive and bulky, and it is difficult to quickly detect large areas of soil lead in the process of agricultural production, and it is difficult to meet the environmental pollution prediction and early warning of agricultural product production areas.

Method used

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  • Rapid detection system for lead in soil
  • Rapid detection system for lead in soil
  • Rapid detection system for lead in soil

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Experimental program
Comparison scheme
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Embodiment Construction

[0023] like figure 1 As shown, the soil lead element rapid detection system is composed of a soil lead element detector and a host computer data processing software. The soil lead element detector integrates a microprocessor, a constant potential meter, a current-voltage conversion amplifier circuit and a power module to complete the electrochemical analysis process. The upper computer data processing software is responsible for sending instructions and detection parameters to the detector, and receiving the data collected by the detector for data analysis. The detector is connected with the upper computer through the RS232 serial communication protocol.

[0024] like figure 2 , 3 As shown, anodic stripping voltammetry is an analytical method that combines electrolytic enrichment with controlled potential and voltammetric analysis. The substance is analyzed by recording the correlation between current I and potential E. The method is divided into two steps: first, the sol...

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Abstract

In order to rapidly obtain the lead content in soil at low cost, the invention provides a rapid detection system for lead in soil. According to the present invention, the rapid detection system is designed based on an anodic stripping voltammetry detection principle, and comprises a soil lead detector and a master computer data processing software, wherein the soil lead detector is designed basedon an anodic stripping voltammetry detection principle, uses a MSP430 mixed signal processor as a control core, integrates a potentiostatic apparatus, a current-voltage conversion amplification circuit and a power module, and is connected to a master computer through RS232 serial communication protocol. According to the present invention, the dissolution peak current detected by the rapid detection system and the lead ion concentration have good linearity, wherein the correlation coefficient was R2 is 0.9951, the relative error between the detection result of the rapid detection system of thepresent invention and the detection result of the atomic absorption spectrometry method is less than 8%, and the repeatability is good; and with the rapid detection system, the lead in farmland soil can be rapidly detected.

Description

Technical field [0001] The invention relates to a detection system, in particular to a rapid detection system for soil lead element. Background technique [0002] Lead is a common heavy metal element. Lead in soil is not easy to be degraded by microorganisms, but it will be enriched in crops, which will have adverse effects on human health. In recent years, "lead poisoning" and "blood lead incidents" have frequently exploded in China. Starting from the source of agricultural products, it is of great practical significance to the safe production of agricultural products in my country to realize the monitoring and pollution prevention of the environment of agricultural products. [0003] At present, the quantitative analysis and detection methods of lead are mainly spectroscopic methods, including atomic absorption spectroscopy, atomic fluorescence spectroscopy, laser-induced breakdown spectroscopy, X-ray fluorescence spectroscopy, etc. Spectroscopy can effectively analyze t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48
Inventor 张桂春
Owner 张桂春
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