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Application of semiconductor compounds in identification and identification of vinegar age

A technology of semiconductors and compounds, applied in the field of spectroscopy and molecular recognition, can solve the problems of poor detection sensitivity, high requirements for detection systems, and difficulties in specific detection, and achieve enhanced effects, wide selection range, and low cost

Active Publication Date: 2021-04-20
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have more or less defects, such as high requirements for the detection system, poor detection sensitivity, and difficulty in specific detection.
Therefore, for the confusion of the age of vinegar on the market, scientific and accurate methods are needed to standardize and identify it. Therefore, it is of great significance to develop a method that is fast, efficient, easy to operate, and can effectively identify and identify the age of vinegar.

Method used

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  • Application of semiconductor compounds in identification and identification of vinegar age
  • Application of semiconductor compounds in identification and identification of vinegar age

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preparation example Construction

[0025] In some embodiments, the preparation method of the semiconducting compound comprises:

[0026] Using the solvothermal method, metal chlorides, ammonium salts, metal organic reagents or metal oxides can be selected as raw materials in absolute ethanol solvents, and reacted at 160-200 °C for 12-24 hours, through alcoholysis and hydrolysis and other reaction processes The semiconductor compound base material is directly obtained; or, the semiconductor compound precursor is firstly obtained by solvothermal method, and then annealed at 400-600° C. for 4-6 hours to obtain corresponding semiconductor compound base materials with different stoichiometric ratios.

[0027] In some embodiments, the preparation of semiconductor compound substrate materials with different oxygen defect concentrations, the semiconductor compound can be used as the SERS active substrate material in a wide range of options, which can be but not limited to WO 2 , W 18 o 49 、WO 3 、MoO 2 、MoO 3-x 、Mo...

Embodiment 1

[0044] put a certain amount of WO 3 Dissolved in a certain amount of ethylenediamine, 180 ℃, reaction 12h, naturally cooled to room temperature. Centrifugation, washing and vacuum drying to obtain WO 3 -EDA precursor. Then the precursor was annealed at 600 °C in Ar for 5 h to obtain WO 2 -C material; put a certain amount of WCl 6 Add and dissolve in a certain amount of ethanol, react at 160 ° C for 24 h, and naturally cool to room temperature. Wash and dry to obtain W 18 O 49 ; then set W 18 O 49 Annealed at 400 °C for 6 h in air to obtain WO 3 . The same amount of vinegar to be tested was added to 3 mL of WO with a concentration of 0.2 mg / mL. 2 -C, W 18 O 49 , and WO 3 In the ethanol solution, let stand for 2h, after the adsorption equilibrium, take 20μL of the mixed solution and drop them on clean Si / SiO 2 On the substrate, the sample 1 to be tested is obtained by natural drying.

[0045] like figure 1 Shown is the enhanced Raman spectrum of organic molecules...

Embodiment 2

[0047] Put a certain amount of WCl 6 Add and dissolve in a certain amount of ethanol, react at 180 ° C for 12 h, and naturally cool to room temperature. Wash and dry to obtain W 18 O 49 . A series of vinegars of different ages were added to 3mL W 18 O 49 In ethanol solution and Ag sol, let stand for 2 h, after adsorption equilibrium, take 20 μL of mixed solution and drop them on clean Si / SiO 2 On the substrate, the sample 2 to be tested is obtained by natural drying.

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Abstract

The invention discloses the application of a semiconductor compound in the identification and appraisal of vinegar age. The application includes: using semiconductor compounds as SERS active substrate materials to perform specific and semi-quantitative detection of organic molecules contained in vinegar. The present invention also provides a method for identifying and identifying the vinegar age of vinegar, which includes: contacting the SERS active base material with the vinegar to be detected, and then detecting it with a Raman spectrometer, according to the semiconductor compound and the organic matter contained in the vinegar The specific Raman enhancement effect is generated between the molecules, which can efficiently identify or semi-quantitatively detect the organic molecules contained in vinegar, so as to identify and identify the age of vinegar. The semiconductor compound base material of the present invention has a wide range of choices, low cost, simple operation, fast and effective, can realize the specificity and semi-quantitative detection of organic molecules contained in vinegar, and can effectively identify the vinegar age of vinegar and identification.

Description

technical field [0001] The invention relates to a method based on SERS (Surface Enhanced Raman Scattering Spectroscopy) technology, using a semiconductor compound base material to perform specific and semi-quantitative detection of organic molecules contained in vinegar, so as to identify and identify the age of vinegar , belongs to the technical field of spectroscopy and molecular recognition. Background technique [0002] Vinegar is a sour flavoring agent, and there are brewed vinegar and synthetic vinegar according to different production methods. Brewed vinegar is made through microbial fermentation with starchy and multi-grain raw materials, sugar raw materials, edible alcohol, etc. Brewed vinegar is a typical traditional fermented food in my country. It is famous at home and abroad for its characteristics of "color", "fragrance", "sourness", "mellowness" and "concentration". Vinegar contains a variety of organic molecules such as aldehydes, acids, alcohols, esters, k...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 赵志刚潘婷丛杉
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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