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A colorimetric sensor containing benzothiazole base dye, its preparation method and its application in detection

A technology of benzothiazole base and colorimetric sensor, which is applied in color/spectral characteristic measurement, analysis through chemical reaction of materials, instruments, etc., which can solve the problem of large amount of dye usage, difficult dye, inconvenient carrying and use detection and other problems, to achieve the effect of long detection cycle and high operation requirements

Active Publication Date: 2019-01-18
CHUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual detection process, it is difficult for dyes in a liquid state to fully contact and react with volatile amines in the environment or food, and there are defects such as a large amount of dyes used, inconvenient carrying and use detection, etc.
The invention uses polyacrylic acid to immobilize benzothiazole base dyes on polyacrylamide films, and embeds them with chitosan chains to prepare immobilized colorimetric sensors, thereby being used for volatile amines in food and the environment Similar substances have no reported precedent

Method used

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  • A colorimetric sensor containing benzothiazole base dye, its preparation method and its application in detection
  • A colorimetric sensor containing benzothiazole base dye, its preparation method and its application in detection

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Embodiment 1

[0028] According to a kind of colorimetric sensor containing probendiazole base dye of scheme in the present invention:

[0029] Such as figure 1 As shown, including polyacrylamide film (PP), polyacrylic acid (PAA), benzothiazole base dye (DB) and chitosan chain (CS), one end of the polyacrylic acid (PAA) is bonded to polyacrylamide On the film (PP), the other end is connected with the benzothiazole base dye (DB) by van der Waals force and physical adsorption and other forces to form a PP-PAA-DB structure; the chitosan chain (CS) and polyacrylic acid (PAA) is electrostatically bonded to further embed the benzothiazole base dye (DB) to form a PP-PAA-DB-CS structure.

Embodiment 2

[0031] According to the scheme described in the present invention, a kind of preparation method of the colorimetric sensor containing probendiazole base dye is as follows:

[0032] Such as figure 1 as shown,

[0033] (1) Preparation of PP-PAA board: take a surface area of ​​36cm 2 A square PP plate, weighed and placed in 1.00mL of 50% AA / H by volume 2 In the petri dish of O solution, nitrogen gas was blown into the petri dish for 5 min and sealed with a parafilm. It was then placed under a UV lamp for overnight irradiation. Then take out the PP-PAA plate and wash it with NaOH aqueous solution with a pH value of 8 to remove the PAA monomer. Finally, wash it again with distilled water and dry it under vacuum;

[0034] (2) Preparation of PP-PAA-DB-CS board: take 9cm 2PP-PAA plate, place it in 30.0mL pH5.0 concentration of 1×10 -4 mol / L dye solution, let stand at room temperature for 4h. Chitosan with the same molar number as polyacrylic acid was placed in 2% volume acetic...

Embodiment 3

[0037] According to the scheme described in the present invention, the application of a colorimetric sensor containing probendiazole base dye in detection is as follows:

[0038] Such as figure 2 as shown,

[0039] (1) Pre-treatment: Use pumps or plastic bags to collect volatile amine gas substances in food or the environment, and store them in glass containers;

[0040] (2) Color observation of the sensor before reaction: observe with naked eyes or record the color of the pre-prepared colorimetric sensor with a camera;

[0041] (3) Sensor reaction: put the pre-prepared colorimetric sensor into the container containing the sample to be tested, and let it stand for 5 minutes to fully react;

[0042] (4) Observation of the color of the sensor after the reaction: observe with the naked eye or record the color of the sensor after the reaction with a camera;

[0043] (5) Color difference of the sensor before and after the reaction: compare the color difference before and after ...

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Abstract

The invention relates to the technical field of volatile amine substance detection, in particular to a colorimetric sensor containing a benzothiazole alkaline dye, a preparation method and application of the sensor in detection. The colorimetric sensor comprises a polyacrylamide film, polyacrylic acid, the benzothiazole alkaline dye and a chitosan chain, wherein one end of the polyacrylic acid is bonded on the polyacrylamide film, the other end of the polyacrylic acid is connected with the benzothiazole alkaline dye through a Van der Waals' force and physical absorption, and the chitosan chain and the polyacrylic acid are subjected to electrostatic bonding, so that the benzothiazole alkaline dye is further coated to form a polyacrylamide film-polyacrylic acid-benzothiazole alkaline dye-chitosan chain structure. According to a sensor technology related to the invention, qualitative analysis can be conducted on volatile amine substances through naked eyes without any device, and quantitative analysis can be conducted on volatile amine substances by utilizing UV-VIS instrument device.

Description

technical field [0001] The invention relates to the technical field of detection of volatile amine substances, in particular to a colorimetric sensor containing benzothiazole base dyes, a preparation method and its application in detection. Background technique [0002] With the rapid development of China's economy and the improvement of people's quality of life, the demand for food and the environment is changing from quantity to quality; The industry has had an impact. Volatile amines mainly come from meat spoilage, industrial and agricultural wastewater, and vehicle exhaust, and fatty volatile amines and aromatic volatile amines can pose a threat to human health at low concentrations, so volatile The real-time rapid detection of sex amines has important research and application value. At present, the traditional detection methods of volatile substances mainly include GC-MS and electronic nose methods. Although these detection methods can accurately detect volatile amine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N21/31
CPCG01N21/31G01N21/783
Inventor 顾海洋李加燕孙艳辉李双芳苗文娟
Owner CHUZHOU UNIV
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