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Intelligent fluorescent label and preparation method and application thereof

A fluorescent label, intelligent technology, applied in the direction of fluorescence/phosphorescence, material analysis by optical means, measurement device, etc., can solve the problems of long reaction time, insensitive and fast detection of small changes, large influence of environmental temperature and humidity, etc.

Inactive Publication Date: 2016-06-29
INNER MONGOLIA AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, these existing technologies still have technical defects such as not being sensitive and fast enough to detect small changes, being greatly affected by ambient temperature and humidity, unstable substances, long reaction time, and certain limitations in detection indicators.

Method used

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  • Intelligent fluorescent label and preparation method and application thereof
  • Intelligent fluorescent label and preparation method and application thereof
  • Intelligent fluorescent label and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Example 1: Preparation of the smart fluorescent label of the present invention

[0090] The implementation steps of this embodiment are as follows:

[0091] Prepare blank microspheres as follows:

[0092] According to the ratio of β-cyclodextrin in grams to sodium hydroxide aqueous solution in ml is 3:87, β-cyclodextrin powder is dissolved in NaOH aqueous solution with a concentration of 35% by weight to obtain a β-cyclodextrin cyclodextrin solution, then

[0093] According to the ratio of β-cyclodextrin in grams to epichlorohydrin in grams is 3:3.0, add epichlorohydrin crosslinking agent to the β-cyclodextrin solution, and then react at room temperature for 1.5 h; then

[0094] According to the ratio of β-cyclodextrin in grams to emulsifier in grams of 3:30, add emulsifying agent consisting of Span80 and Tween20 in a weight ratio of 3:1 to the above reaction solution with a concentration of 1.8% by weight. kerosene solution, reacted for 5 hours at a stirring speed ...

Embodiment 2

[0100] Example 2: Preparation of the smart fluorescent label of the present invention

[0101] The implementation steps of this embodiment are as follows:

[0102] Prepare blank microspheres as follows:

[0103] According to the ratio of β-cyclodextrin in grams to sodium hydroxide aqueous solution in ml is 3:80, β-cyclodextrin powder is dissolved in NaOH aqueous solution with a concentration of 40% by weight to obtain a β-cyclodextrin cyclodextrin solution, then

[0104] According to the ratio of β-cyclodextrin in grams to epichlorohydrin in grams is 3:3.3, add epichlorohydrin crosslinking agent to the β-cyclodextrin solution, and then react at room temperature for 2.5 h; then

[0105] According to the ratio of β-cyclodextrin in grams to emulsifier in grams of 3:45, add emulsifying agent consisting of Span80 and Tween20 in a weight ratio of 3:1 to the above reaction solution with a concentration of 2.0% by weight. kerosene solution, reacted for 6 hours at a stirring speed ...

Embodiment 3

[0110] Example 3: Preparation of the smart fluorescent label of the present invention

[0111] The implementation steps of this embodiment are as follows:

[0112] Prepare blank microspheres as follows:

[0113] According to the ratio of β-cyclodextrin in grams to sodium hydroxide aqueous solution in ml is 3:100, β-cyclodextrin powder is dissolved in NaOH aqueous solution with a concentration of 45% by weight to obtain a β-cyclodextrin cyclodextrin solution, then

[0114] According to the ratio of β-cyclodextrin in grams to epichlorohydrin in grams is 3:3.7, add epichlorohydrin crosslinking agent to the β-cyclodextrin solution, and then react at room temperature for 2.2 h; then

[0115] According to the ratio of β-cyclodextrin in grams to emulsifier in grams of 3:50, add emulsifying agent consisting of Span80 and Tween20 in a weight ratio of 3:1 to the above reaction solution with a concentration of 2.2% by weight kerosene solution, reacted for 7 hours at a stirring speed ...

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Abstract

The invention relates to an intelligent fluorescent label and a preparation method and application thereof.The preparation method comprises the steps of blank micro-sphere preparation, fluorescent indicator solution preparation, inclusion of a fluorescent indicator and a blank micro-sphere and the like.The blank micro-sphere is high in sensitivity, high in detection speed, irreversible in structure, uniform in micro-sphere particle size, good in monodispersity and stability and high in luminous efficiency, the influence of external conditions such as solvent, heat, electricity and magnetism is smaller than pure fluorescent compounds, and therefore an excellent application prospect is achieved.

Description

【Technical field】 [0001] The invention belongs to the technical field of food quality detection. More specifically, the present invention relates to a method for preparing a smart fluorescent label, to the smart fluorescent label, and to applications of the smart fluorescent label. 【Background technique】 [0002] Rhodamine-based fluorescent substances have good photostability, adjustable spectrum range (500-680nm), molar absorption coefficient, fluorescence quantum yield, absorption and emission wavelengths. Although rhodamine has good photophysical and photochemical properties, it is not sensitive to pH. Sensitive, difficult to apply to pH detection. To this end, the structure of rhodamine has been modified so that it can detect changes in pH. [0003] Food, beverages, milk, etc. are easily deteriorated by factors such as microbial reproduction, active ingredient decomposition or oxidation, so the shelf life must be marked on the product packaging. In most cases, the she...

Claims

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Application Information

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IPC IPC(8): G01N21/64
CPCG01N21/6428G01N2021/6439
Inventor 孙文秀樊丽岩武玲玲张师董同力嘎
Owner INNER MONGOLIA AGRICULTURAL UNIVERSITY
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