Molecular imprinting fluorescence sensor for quantitative detection of alkylresorcinol, and preparation method thereof

A technology of alkyl resorcinol and fluorescent sensor, which is applied in the field of chemical analysis, can solve the problems of lack of molecularly imprinted fluorescent sensors, etc., and achieve the effects of good polymerization degree, high selectivity and good detection stability

Inactive Publication Date: 2021-04-13
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is a lack of molecularly imprinted fluorescent sensors for the detection of ARs, so as to realize the rapid and simple quantitative detection of ARs in whole grains.

Method used

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  • Molecular imprinting fluorescence sensor for quantitative detection of alkylresorcinol, and preparation method thereof
  • Molecular imprinting fluorescence sensor for quantitative detection of alkylresorcinol, and preparation method thereof
  • Molecular imprinting fluorescence sensor for quantitative detection of alkylresorcinol, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039](1) Add 80mg tellurium powder, 50mgNaBH to a dry three-necked flask 4 and 1.0 mL of double-distilled water, and nitrogen for 10 minutes, then put the three-necked flask into a constant temperature water bath at 60°C for heating and stirring, keep nitrogen flowing, stop the reaction after 20 minutes, and the obtained supernatant is the NaHTe aqueous solution.

[0040] (2) Preparation of CdTe quantum dots: 0.2864gCdCl 2 2.5H 2 0. 100mL of double distilled water and 0.097g of mercaptoethylamine were put into another clean three-necked flask, ultrasonically dissolved, and the pH value of the solution was adjusted to 10.2 with 0.1mol / L NaOH, and protected by nitrogen gas. Heat the temperature in a constant temperature water bath to 60°C, add the newly prepared NaHTe aqueous solution into the flask, place the flask in the water bath, remove nitrogen, and heat to reflux.

[0041] (3) Preparation of molecularly imprinted fluorescent sensor: take 2mL of CdTe quantum dots into a...

Embodiment 2

[0043] (1) Preparation of NaHTe aqueous solution: add 50.8mg tellurium powder, 60.53mg NaBH to a dry three-necked flask 4 and 10 mL of double-distilled water, and nitrogen for 20 minutes, then put the three-necked flask into a 90°C constant temperature water bath for heating and stirring, keep nitrogen flowing, stop the reaction after 40 minutes, and the obtained supernatant is the NaHTe aqueous solution.

[0044] (2) Preparation of CdTe quantum dots: 45.67mg CdCl 2 2.5H 2 0. 40 mL of double distilled water and 0.021 g of mercaptopropionic acid were put into another clean three-necked flask, ultrasonically dissolved, and the pH value of the solution was adjusted to 10.6 with 0.1 mol / L NaOH, and protected by nitrogen gas. Heat in a constant temperature water bath to 105°C, add the newly prepared NaHTe aqueous solution into the flask, place the flask in the water bath, remove nitrogen, and heat to reflux.

[0045] (3) Preparation of molecularly imprinted fluorescent sensor: Ta...

Embodiment 3

[0047] (1) Preparation of NaHTe aqueous solution: add 60mg tellurium powder, 0.113g NaBH to a dry three-necked flask 4 and 10 mL of double-distilled water, and nitrogen for 20 minutes, then put the three-necked flask into a 120°C constant temperature water bath for heating and stirring, keep nitrogen flowing, stop the reaction after 60 minutes, and the obtained supernatant is the NaHTe aqueous solution.

[0048] (2) Preparation of CdTe quantum dots: 0.228g CdCl 2 2.5H 2 0. 100 mL of double distilled water and 0.18 g of mercaptoacetic acid were put into another clean three-necked flask, ultrasonically dissolved, and the pH value of the solution was adjusted to 11.2 with 0.1 mol / L NaOH, and protected by nitrogen gas. Heat in a constant temperature water bath to 150°C, add the newly prepared NaHTe aqueous solution into the flask, place the flask in the water bath, remove nitrogen, and heat to reflux.

[0049] (3) Preparation of molecularly imprinted fluorescent sensor: Take 30 ...

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Abstract

The invention discloses a molecular imprinting fluorescence sensor for quantitative detection of alkylresorcinol, and a preparation method thereof, and relates to the technical field of chemical analysis. The preparation method comprises the following steps: (1) preparing a NaHTe aqueous solution; (2) preparing CdTe quantum dots; and (3) preparing a molecular imprinting fluorescence sensor: uniformly mixing the CdTe quantum dots obtained in the step (2) with a pore-foaming agent, introducing N2 to remove oxygen, adding ARs to react for 10-30 minutes, then adding a functional monomer, a cross-linking agent and ammonia water, introducing N2, stirring at 50-70 DEG C to react for 12-36 hours, removing ARs from the obtained precipitate after the reaction is finished, and drying to obtain the molecular imprinting fluorescence sensor. The fluorescence sensor is good in polymerization degree, capable of being used for rapidly and effectively achieving ARs quantitative detection, good in detection stability and high in selectivity.

Description

technical field [0001] The invention relates to the technical field of chemical analysis, in particular to a molecularly imprinted fluorescence sensor for quantitative detection of alkyl resorcinol and a preparation method thereof. Background technique [0002] Alkylresorcinols (1,3-dihydroxy-5-alkylbenzene derivatives, ARs) are a class of phenolic substances discovered in recent years mainly in the bran of wheat crops such as wheat and triticale. According to the number of carbon atoms in its saturated alkyl side chain, it can be divided into 5-heptadecyl resorcinol (C17:0), 5-nonadecyl resorcinol (C19:0), 5-heptadecyl resorcinol (C19:0), Hexacyl resorcinol (C21:0), 5-tricosyl resorcinol (C23:0), 5-pentacyl resorcinol (C25:0), etc. homologue components. Since ARs are seldom present in embryo and endosperm, they are recognized as markers of whole wheat products. As the health effects of whole grains are supported by more and more evidence, the 2016 edition of the "Dietary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/6402
Inventor 王静范浩然李洪岩温洋洋李婕毛慧佳陈志军
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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