Method for quantitatively analyzing components in white spirit

Abstract

The invention belongs to a white spirit analysis method and discloses a method for quantitatively analyzing components in white spirit by utilizing an infrared spectrum and combining with data processing, aiming at solving the defects in a conventional white spirit analysis method that a sample need to be pretreated before test, the measurement time is long, rapid field detection cannot be performed and the test price is high. The method comprises the following steps: selecting an instrument Nicolet Nexus 670 and an attenuated total reflection accessory; selecting Agilent 7890-5975c gas chromatograph-mass spectrometer; setting parameters of an infrared spectrometer; detecting the infrared spectrum of the sample; preparing standard working curve solutions of different concentrations to obtain multiple groups of working curves; measuring the chromatograph of the sample; solving the content of each substance by utilizing the working curves, and recording the substance content information serving as the characteristic as C=[c1, c2,...cn]; and comparing the detection result to identify the white spirit. The method has the advantages that the identification accuracy rate is high; the identification speed is high; the fake liquor dens can be traced, and manpower and material resources of supervision departments are saved.

Description

technical field [0001] The invention belongs to a liquor analysis method, in particular to a liquor component quantitative analysis method using infrared spectrum combined with data processing. Background technique [0002] Baijiu is a unique alcoholic beverage among distilled liquors in the world. It is a beverage fermented, fermented and distilled from wheat millet, sorghum, corn, sweet potato, rice bran and other grains or other fruits. It is brewed with high-quality clean water. Liquor liquor is colorless and transparent, rich in aroma, mellow and soft, with various flavors. Liquor, except containing a very small amount of sodium, copper, zinc, almost does not contain vitamins, calcium, phosphorus, iron and other materials, what contained is only water and ethanol. Liquor has the function of invigorating blood circulation and dredging the veins, helping medicine, increasing appetite, eliminating fatigue, making people light and refreshing from the cold. Drinking a smal...

AI Technical Summary

Problems solved by technology

The disadvantages of chromatography are: 1. Complicated pretreatment of the sample such as extraction is required before testing; 2. A large amount of water in liquor will damage the test equipment; 3. The chemical composition in liquor is relatively complicated in order to accurately measure various The content of the substance needs to obtain the working curve of various substances, and the workload is large; 4. If the normalized area size ratio of the substance is used as a measurement method for the content of the substance, there will be a large error, and subsequent analysis cannot be performed; 5. Long test time: Usually it takes about 40 minutes to test a sample, which is not conducive to rapid on-site detection; 6. The detection of volatile substances requires a special chromatographic column

The disadvantages of spectroscopic identification of liquor are: the establishment of quantitative analysis model requires accurate reference values, and the reference values ​​are usually detected by chromatography, so the steps are troublesome and the test time is long

[0007] Elemental analysis method: This method is mainly to detect the content of metal ions in the sample or the ratio of isotopes as a feature to identify real wine and fake wine. Pretreatment; 2. To accurately measure the content of various substances in the sample, it is necessary to obtain the working curve of various substances, which is quite time-consuming; 3. The test is expensive; 4. It is impossible to quickly detect on-site

[0008] Due to the above-mentioned shortcomings of the prior art method for quantitatively analyzing the components of liquor, there are many steps and a long time for identifying true and false liquor, especially the inability to quickly detect on-site, which makes it difficult to find fake liquor and endangers society.

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