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Colorimetric detection method of triazolone

A detection method, the technology of triadimefon, applied in color/spectral characteristic measurement, measuring device, material analysis by observing the influence on chemical indicators, etc., can solve the problems of time-consuming, high detection technology requirements, expensive equipment, etc. problems, to achieve the effect of convenient operation, short preparation cycle and rich color changes

Pending Publication Date: 2022-01-18
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These analysis and detection methods have the advantages of high precision and small cross-interference between samples, but there are also shortcomings such as high detection technology requirements, long time-consuming, and expensive equipment.

Method used

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  • Colorimetric detection method of triazolone
  • Colorimetric detection method of triazolone
  • Colorimetric detection method of triazolone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add ultrapure water and 1% trisodium citrate aqueous solution into the flask, stir at 124°C until the reaction solution in the flask reaches boiling, then quickly add 1% tetrachloroalloy acid aqueous solution, Continue to stir at 124°C for 20min, stop heating until the color of the reaction system in the flask gradually turns dark red, then continue to stir until the solution in the flask cools to room temperature, that is, the gold nanoparticle solution is prepared, and the brown bottle is transferred Medium-sealed and preserved for subsequent use; wherein the volume ratio of trisodium citrate aqueous solution and ultrapure water is 1:4, the volume of tetrahydrate chloroauric acid aqueous solution: the ratio of trisodium citrate aqueous solution and ultrapure water total volume is 1:22, and The mol ratio of chloroauric acid hydrate and trisodium citrate is 1:4; The particle diameter of the prepared nano-gold particle is about 9nm, and its particle shape is as follow...

Embodiment 2

[0028] (1) Add ultrapure water and trisodium citrate aqueous solution with a mass concentration of 0.5% to the flask, stir at 120°C until the reaction solution in the flask boils, and quickly add an aqueous solution of tetrachloroalloy acid with a mass concentration of 1%. Continue to stir at 120°C for 20 minutes until the color of the reaction system in the flask gradually turns dark red, then stop heating, then continue to stir until the solution in the flask cools to room temperature, that is, the gold nanoparticle solution is prepared and placed in a brown bottle It is sealed and stored for subsequent use; wherein the volume ratio of trisodium citrate aqueous solution and ultrapure water is 1:10, and the volume of tetrahydrate chloroauric acid aqueous solution: the ratio of trisodium citrate aqueous solution and ultrapure water total volume is 1:27, and the ratio of tetrahydrate The molar ratio of chloroauric acid to trisodium citrate is 1:5; the particle size of the prepar...

Embodiment 3

[0033](1) Add 0.04% tetrachloroalloy acid aqueous solution and ultrapure water to the flask, stir at 117°C until the reaction solution in the flask boils, then quickly add 0.5% trisodium citrate aqueous solution, Continue heating and stirring at 117°C for 20 minutes until the color of the reaction system gradually turns dark red, stop heating, and then continue stirring until the solution in the flask cools to room temperature to obtain a solution of gold nanoparticles and transfer it to a brown bottle It is sealed and stored for subsequent use; wherein the volume ratio of trisodium citrate aqueous solution and ultrapure water is 1:15, the volume of tetrahydrate chloroauric acid aqueous solution: the ratio of trisodium citrate aqueous solution and ultrapure water total volume is 1:26, and the ratio of tetrahydrate The molar ratio of chloroauric acid to trisodium citrate is 1:4.6; the particle diameter of the prepared nano-gold particles is about 16nm.

[0034] (2) Mix 500 μL o...

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Abstract

The invention provides a colorimetric detection method of triazolone, and belongs to the technical field of pesticide residue detection. The method comprises the steps that a nanogold particle solution is prepared through a trisodium citrate oxidation-reduction method, nanogold particles and a buffer solution are mixed, and a nanogold colorimetric sensor is obtained. After the prepared nanogold particles make contact with triazolone, the color of a detection system changes from wine red to dark blue within 10 min, the detection method can be separated from large instruments and equipment, and semi-quantitative analysis detection of triazolone is achieved through color change under the natural light condition; the nanogold colorimetric sensor is good in light transmission performance, and quantitative detection of a target substance can be realized under an ultraviolet visible spectrophotometer; the nanogold particles are controllable in particle size and shape, convenient to prepare, low in cost and easy to store and carry.

Description

technical field [0001] The invention belongs to the field of pesticide residue detection and relates to a method for quickly detecting triadimefon with a nano-gold colorimetric sensor. Background technique [0002] Triadimefon, aliased as fenxining, chlorothalone, and beliton; is a widely used triazole fungicide, commonly used in the control of powdery mildew, rust, and smut in crops such as wheat, corn, rice, and cotton . In order to increase the yield of agricultural products, fungicides must be used in the agricultural production process, and the large-scale use of triadimefon will exist in the natural environment for a long time, which will inevitably have adverse effects on the endocrine system of humans and wild animals and affect their health. [0003] At present, the methods for detecting triadimefon are mainly instrumental analysis methods, such as high performance liquid chromatography, liquid chromatography-mass spectrometry, enzyme-linked immunoassay, spectropho...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/78
CPCG01N21/3103G01N21/78
Inventor 李国栋顾丽莉景联鹏李增良唐徐禹
Owner KUNMING UNIV OF SCI & TECH
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