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Composite substrate material and preparation method thereof, and quantitative detection method of plasticizer in Baijiu

A composite substrate and plasticizer technology, applied in the field of detection, can solve the problems of cumbersome processing, no specific identification and capture function of plasticizer molecules, poor stability, etc., to ensure detection accuracy, enrich SERS hot spots, and increase stability. sexual effect

Inactive Publication Date: 2021-06-04
郗丹
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the above-mentioned substrate materials have the disadvantages of poor stability and cumbersome pre-treatment during the detection process, and there is no specific recognition and capture function of plasticizer molecules.

Method used

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  • Composite substrate material and preparation method thereof, and quantitative detection method of plasticizer in Baijiu
  • Composite substrate material and preparation method thereof, and quantitative detection method of plasticizer in Baijiu
  • Composite substrate material and preparation method thereof, and quantitative detection method of plasticizer in Baijiu

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Embodiment 1

[0040] Embodiment 1 of the present invention provides a kind of composite base material, and its preparation method comprises the following steps:

[0041] S1, add ferric nitrate nonahydrate, silver nitrate, and anhydrous sodium acetate into 100mL of ethylene glycol at a ratio of 4mmoL: 1mmol: 40mmol, then add 1.0g of polyvinylpyrrolidone, and magnetically stir for 4h to obtain a mixed solution. Then, The mixed solution was placed in a hydrothermal reaction kettle and subjected to a hydrothermal reaction at 200°C for 12 hours; after the reaction was completed, it was cooled to room temperature, filtered, washed and dried in vacuum to obtain Ag@Fe with a core-shell structure. 3 o 4 Composite nanoparticles;

[0042] S2, 0.3g of the Ag@Fe 3 o 4 The composite nanoparticles were dispersed in 50 mL of cetyltrimethylammonium bromide solution with a concentration of 1 mmol / L, and then 15 mL of absolute ethanol and 0.8 mL of amphiphilic polymer L- Cysteine ​​solution, 50 mL of sodi...

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Abstract

The invention provides a composite substrate material and a preparation method thereof, and a quantitative detection method of a plasticizer in Baijiu. The preparation method comprises the following steps: firstly, preparing Ag@Fe3O4 nano-particles with a core-shell structure by adopting a one-step hydrothermal synthesis method; and then, carrying out self-assembly by adopting a self-assembly system of ethanol and an amphiphilic polymer and combining with mesoporous silica coating treatment, thereby constructing the Ag@Fe3O4@mSiO2 nano-particles with a multi-core-inner and outer double-shell structure by coating the multi-core Ag@Fe3O4 nano-particles with mesoporous silica as a shell structure, and finally grafting beta-cyclodextrin to the surface of the shell of the mesoporous silica. Based on the unique multi-core-inner and outer double-shell structure of the composite substrate material, all the components can cooperate with one another, and the composite substrate material has the advantages of magnetism, specific capture function, high substrate stability and high plasticizer detection precision. The quantitative detection method has the advantages of simple detection process, high detection speed and high detection precision, and can be applied to the field of plasticizer detection.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a composite base material, a preparation method thereof, and a quantitative detection method for plasticizers in liquor. Background technique [0002] In recent years, with the rapid development of the food industry, food additives have become an indispensable substance in the food production process, but excessive, over-range and non-food-grade additives are food pollutants, which will cause serious damage to the human body . In 2012, the incident that the content of plasticizers in liquor exceeded the standard broke out, which brought plasticizers into people's field of vision. Plasticizers are widely used to increase the flexibility and ductility of plastic packaging. Phthalate plasticizers are the most commonly used type, but because their chemical structure is similar to endogenous estrogen, they will enter the human body interfere with normal hormone levels. [0003] S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 郗丹
Owner 郗丹
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