White spirit appraising and source-tracing method based on infrared spectroscopy

Abstract

The invention discloses a white spirit appraising and source-tracing method based on infrared spectroscopy. The method comprises specific steps as follows: an infrared spectrometer is used for collecting infrared spectrums of a true spirit sample and an adulterated spirit sample ferreted by the police, and true-spirit infrared spectrum library and adulterated-spirit infrared spectrum library are established respectively; a least squares support vector machine is used for establishing a hierarchical classification and appraisal model for the established true-spirit infrared spectrum library and establishing an adulterated spirit den source-tracing model for the established adulterated-spirit infrared spectrum library respectively; and the infrared spectrum of to-be-detected white spirit is collected, classified and appraised with the established hierarchical classification and appraisal model and the adulterated spirit den source-tracing model, and appraising and source-tracing of the to-be-tested white spirit are achieved through comprehensive analysis of a result. The white spirit appraising and source-tracing method based on infrared spectroscopy has the advantages that the appraising speed is high, and the appraising accuracy is high; and classification and appraisal models of the true spirit library and the adulterated spirit library are combined, and the analysis result is more detailed.

Description

technical field [0001] The invention relates to the field of liquor identification, in particular to a method for authenticity identification and source tracing of liquor by using infrared spectrum. Background technique [0002] Liquor is a unique traditional product in my country, with a wide variety and a long history. In recent years, the output of liquor, especially famous and high-quality liquor, has been increasing. Driven by profit, some lawbreakers pretend to be high-end wine with similar taste but relatively low price, and pour it into the packaging of high-end wine, and some even pour the low-quality wine brewed by themselves into the packaging of high-end wine. to make huge profits. How to identify the authenticity of liquor, confirm the counterfeiting means of counterfeit wine and trace the source of counterfeit dens is one of the important steps for public security organs to crack down on the illegal activities of manufacturing and selling counterfeit wine. ...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: 1. There is a large amount of water in the liquor, and the existence of water will damage the instrument, and the sample needs to be complicated for pretreatment before testing.

2. The chemical composition in liquor is very complex, usually water and ethanol account for 98%, and the remaining 2% determines the quality of liquor; the content of key substances that determine the quality of liquor is very small, and it is impossible to determine it due to errors during the test All substance content of liquor quality

3. The use of chromatography to measure the content of substances in liquor is to use the normalized area of ​​the substance as the content of the substance. This calculation method itself has a large error, and subsequent analysis cannot be performed

4. The test time is long, usually it takes about 40 minutes to test a sample, so it is not conducive to production on-line testing

Another method is to remove water and ethanol in liquor through physical separation, and then collect and analyze the remaining residual substances by infrared spectrum. This method can effectively eliminate the influence of water and ethanol and improve the effect of infrared spectroscopy on liquor. The analysis accuracy of medium and trace components, but the disadvantage is that the experimental conditions are harsh, time-consuming, and the complicated separation operation is easy to cause errors, and also loses the ethanol concentration information in liquor

Images