Method for rapidly detecting clethodim pesticide residues in soil

A technology for pesticide residues and clethodim, which is applied in the field of environmental protection and agricultural production, can solve the problems of cumbersome processing and high cost of clethodim determination, and achieve the effects of low detection cost, high degree of automation, and small sampling volume

Active Publication Date: 2014-12-17
YANGZHOU POLYTECHNIC INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the defects of high cost and cumbersome processing process of clethodim at present, and propose a simple and fast method for detecting clethodim pesticide residues in soil

Method used

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  • Method for rapidly detecting clethodim pesticide residues in soil
  • Method for rapidly detecting clethodim pesticide residues in soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] 1. Make a linear relationship diagram between clethodim concentration and current:

[0026] 1. After cleaning the glassy carbon electrode, use TiO on its surface 2 After the suspension was drip-coated, it was left to dry at room temperature to make TiO 2 Modified glassy carbon electrodes.

[0027] 2. Dissolve clethodim in acetonitrile to make a concentration of 1mmolL -1 For clethodim acetonitrile solution, add 0μL, 0.5μL, 10μL, 20μL, 40μL, 60μL 1mmolL to the glass container with 5mL phosphate buffer solution respectively -1 Clethodim solution, prepared at concentrations of 0, 0.1, 2.0, 4.0, 8.0 and 12 μmol L -1 clethodim electrolyte.

[0028] Take 0μL concentration as 1mmolL -1 Clethodim solution (blank) was placed in a glass container filled with 5 mL of PBS (phosphate buffered saline) as CK (0 μmol L -1 ).

[0029] Take 0.5μL concentration as 1mmolL -1 The clethodim solution was placed in the aforementioned glass container filled with 5 mL of PBS (phosphate b...

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Abstract

The invention provides a method for rapidly detecting clethodim pesticide residues in soil, relating to the technical field of agricultural production and also relating to the technical field of environmental protection. The method comprises the following steps: firstly, drawing a linear relation schema of clethodim concentration and current; taking a TiO2 modified glassy carbon electrode as a working electrode, taking a saturated potassium chloride electrode as a reference electrode and taking a platinum electrode as an auxiliary electrode; adding clethodim solution to be detected, which is obtained by extracting from the soil, into a glass container filled with a phosphate buffered solution; taking a 250W halogen tungsten lamp as a light source and irradiating a clethodim electrolyte to be detected; measuring a light current signal peak value of the obtained clethodim solution to be detected; and measuring the light current signal peak value of the obtained clethodim solution to be detected by using the drawn linear relation schema of the clethodim concentration and the current to find out the clethodim concentration in the tested sample. The method can obtain an analysis result by using only three minutes, is low in detection cost, high in automation degree, simple and convenient to operate and small in sampling amount.

Description

technical field [0001] The invention relates to the technical field of agricultural production and also to the technical field of environmental protection, in particular to the detection technology of clethodim pesticide residue in soil. Background technique [0002] Clethodim is a new type of dry field post-emergence herbicide with excellent selectivity. It is suitable for controlling wild oats, crabgrass, foxtail, goosegrass, bluegrass, hard grass and other gramineous weeds in broad-leaved fields such as soybeans, rapeseed, cotton, and peanuts. After spraying, it can be quickly absorbed by the stems and leaves of gramineous weeds and transmitted to the shoot tips and meristems, inhibiting the activity of meristems, destroying cell division, and eventually leading to the death of weeds. It is widely used in vegetables, food crops, etc. In the production process, the current scope of use has a tendency to further expand. However, with the continuous expansion of its scope ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N27/30
Inventor 金党琴
Owner YANGZHOU POLYTECHNIC INST
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