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A method and detection device for rapidly detecting acetochlor residues in soil

An acetochlor and soil technology, applied in the field of electrochemistry, can solve the problems of cumbersome sample extraction and purification steps, high requirements for instruments and equipment, and complicated use of instruments, and achieves simple and feasible sample processing, low detection costs, and stable instrument performance. Effect

Active Publication Date: 2018-03-27
YANGZHOU POLYTECHNIC INST
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Problems solved by technology

Using mass spectrometry can improve the sensitivity and selectivity of the analysis, but the use of the instrument is more complicated and the cost is higher, the sample extraction and purification steps are relatively cumbersome, the sensitivity is affected by the steps of sample purification, concentration, etc., and these methods require high equipment

Method used

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  • A method and detection device for rapidly detecting acetochlor residues in soil
  • A method and detection device for rapidly detecting acetochlor residues in soil
  • A method and detection device for rapidly detecting acetochlor residues in soil

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Embodiment Construction

[0029] A method for rapid detection of acetochlor residues in soil, the main technical steps of which include:

[0030] (1) Add phosphate buffer solution to the electrolytic cell;

[0031] (2) adding glucose solution into the electrolytic cell;

[0032] (3) Start the magnetic stirrer;

[0033] (4) Set the bias potential;

[0034] (5) Put the working electrode, reference electrode, and auxiliary electrode into the electrolytic cell, add acetochlor solution into the electrolytic cell, and turn off the magnetic stirrer after 30 seconds.

[0035] (6) Measure the photocurrent signal.

[0036] The working electrode is a glassy carbon electrode modified by graphene / glucose oxidase / chitosan, the reference electrode is a saturated calomel electrode, and the auxiliary electrode is a platinum electrode.

[0037] Add 10 mL of PBS solution 6 containing 0.8 mM glucose (PBS is a phosphate buffer solution) into electrolytic cell 5 , and then insert working electrode 2 , reference electrod...

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Abstract

The invention discloses a method for rapidly detecting acetochlor residues in soil. The method comprises the following steps of a, making a linear relationship diagram of acetochlor concentration and current, namely placing a working electrode, a reference electrode and an auxiliary electrode into an electrolytic tank respectively, arranging a halogen lamp light source below the electrolytic tank, upwards irradiating acetochlor electrolyte from a part below the electrolytic tank by virtue of the halogen lamp light source under the condition of bias potential being 0V, respectively measuring to obtain light current signal values of acetochlor solutions at different known concentrations, and making the linear relationship diagram of acetochlor concentration and suppressor light current; b, measuring a light current signal value of an acetochlor solution to be measured, and calculating the concentration of acetochlor in a test sample. A device for rapidly detecting acetochlor residues in soil comprises an electrochemical workstation, the light source, the electrolytic tank, the working electrode, the reference electrode and the auxiliary electrode. The method and the device are low in detection cost and time consumption, high in automation degree, convenient to operate and small in sampling amount.

Description

technical field [0001] The invention relates to an electrochemical method, in particular to a method for rapidly detecting acetochlor residues in soil. Background technique [0002] Acetochlor is one of the most widely used dryland herbicides. However, due to the long degradation cycle of acetochlor, it is easy to migrate in water and soil environments, and its metabolite quinone imine has weak genotoxicity and carcinogenicity. [0003] Before the present invention, the commonly used methods for detecting acetochlor were mostly chromatography combined with other techniques. Using mass spectrometry can improve the sensitivity and selectivity of analysis, but the use of instruments is more complicated and the cost is higher, the steps of sample extraction and purification are relatively cumbersome, and the sensitivity is affected by steps such as sample purification and concentration, and these methods require high equipment. Contents of the invention [0004] The object of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26G01N27/327G01N27/36
CPCG01N27/26G01N27/3273G01N27/36
Inventor 金党琴周祥祥
Owner YANGZHOU POLYTECHNIC INST
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