A method for detecting the alcohol content of liquor based on color-changing nanomaterials
A technology of nanomaterials and detection methods, which is applied in material inspection products, analytical materials, material analysis by optical means, etc., can solve the problems of inability to meet the real-time detection of liquor, poor reproducibility, inportability, etc., and achieve stable properties and preparation. Simple, large surface area effect
Active Publication Date: 2021-09-21
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
Traditionally, these detection methods are based on the aggregation or dispersion of nanoparticles and the catalyzed color reaction of nanozymes. However, most of them rely on the modification of DNA or chemical molecules, and they are all solution detection systems, which still cannot get rid of the unstable and heavy Poor performance, non-portability and other defects cannot meet the demand for real-time detection of liquor on-site
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Embodiment 1
[0041] (1) The filter paper is prepared into a circular test paper sheet with a diameter of 0.6 cm, and it is fully immersed in a mixed solution of butyl acrylate and isooctyl acrylate, and the volume ratio of butyl acrylate and isooctyl acrylate is 3: 2. After soaking for 1 hour, treat the test paper sheet in an atmospheric cold plasma reactor (temperature 60°C, plasma power 10W) for 2 minutes, and place the test paper sheet after plasma treatment in a vacuum drying oven for 4 hours to obtain a hydrophobic test strips;
[0042](2) Soak the hydrophobic test paper sheet prepared in step (1) in 5 mL of nano-cerium oxide aqueous solution with a concentration of 4 mg / mL, then take 2 mL of cyclohexane with a pipette and slowly add it to the In the aqueous phase, a layered aqueous phase and an organic phase were obtained; then, 1.5 mL of acetone was taken with a syringe and injected into the liquid surface vertically from above the center of the liquid surface. After stabilization...
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Abstract
The invention discloses a method for detecting the alcohol content of liquor based on a color-changing nano material. The detection method comprises the following steps: firstly prepare a color-changing nano-material test paper sheet, drop different concentrations of alcohol onto the test paper sheet, take a picture after the test paper sheet develops color, and the photo is processed and read in grayscale, and then the grayscale value Fitting with the alcohol content to obtain a linear regression equation, and finally drop the alcohol solution to be tested onto the color test paper, take a photo of color development, and perform grayscale processing on the photo, read the gray value of the photo and substitute it into the linear regression equation, that is, The alcohol content in the sample to be tested. The invention utilizes the color-changing nanometer material to construct the colorimetric test paper for the determination of the alcohol content of liquor, without enzymatic color reaction and special instruments. Compared with the prior art, the present invention only needs to use the test paper to realize the rapid determination of the alcohol content, which is very suitable for the rapid real-time detection of the liquor alcohol content by the market supervision department.
Description
technical field [0001] The invention relates to the field of food detection, in particular to a method for detecting the alcohol content of liquor based on color-changing nanomaterials. Background technique [0002] Baijiu is a kind of distilled liquor unique to China. It has a long history of thousands of years and is one of the six major distilled liquors in the world. Liquor flavor is affected by many factors, among which ethanol concentration is an important indicator of liquor production and sales, usually expressed in alcohol. Alcohol refers to the number of milliliters of alcohol (ethanol) contained in 100mL of liquor, that is, the volume percentage. my country has clear requirements for the alcohol content of various liquors, and stipulates that the error range between the product measurement results and the label value is between -1.0°~+1.0°. [0003] The traditional measuring method of liquor alcohol content has sensory inspection method, physical analysis method...
Claims
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IPC IPC(8): G01N21/78G01N33/14G06T7/90
CPCG01N21/78G01N33/146G01N2021/7759G06T7/90
Inventor 孙大文周希艺蒲洪彬黄伦杰韦庆益
Owner SOUTH CHINA UNIV OF TECH
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