Method for identifying baijiu

Abstract

The invention discloses a method for identifying baijiu, and belongs to the field of technologies for identifying baijiu. The method includes steps of selecting a plurality of batches of certain types of genuine baijiu from places of origin, respectively taking certain baijiu samples, arranging the baijiu samples in color comparison tubes with stoppers, adding a certain quantity of internal standard solution into each color comparison tube, uniformly mixing the baijiu samples and the internal standard solution with one another to obtain mixed liquid, feeding the mixed liquid into a gas chromatographic instrument with a hydrogen flame ionization detector (FID), detecting the mixed liquid, determining the nature of the mixed liquid according to comparison of retention values of various component peaks on chromatograms to standard samples and quantifying the mixed liquid by the aid of peak area normalization processes; carrying out Euclidean distance cluster analysis on quantitative results obtained from the to-be-identified samples and data in databases for genuine baijiu from places of origin and judging whether the samples are the genuine baijiu from the places of origin or not by the aid of cluster tree diagrams.

Description

technical field [0001] The invention relates to a method for identifying liquor of origin based on gas chromatography technology, and belongs to the technical field of liquor identification. Background technique [0002] Geographical indications, also known as indications of origin, are defined in Article 22, paragraph 1, of the Agreement on Trade-Related Aspects of Intellectual Property Rights (TRIPS Agreement for short): "It marks that a commodity originates from a member's territory, or origin a region or place within the territory to which a given quality, reputation or other characteristic of the goods is primarily associated with that geographical origin". Alcoholic products are important agricultural products with strong regional characteristics. In the TRIPS Agreement, greater protection is provided for geographical indications of alcoholic beverages. [0003] As a traditional alcoholic beverage in China, Chinese liquor has greatly promoted the development of the na...

AI Technical Summary

Problems solved by technology

For example, the evaluation of the fingerprint correlation coefficient method evaluates the consistency of the discrimination samples based on the fuzzy "high similarity" or "high correlation". , it is difficult to make a reasonable judgment

At the same time, due to the particularity of the formation of liquor quality, the same batch of products undergoes different storage times or storage temperatures, and their internal substances are transformed into each other, resulting in changes in the characteristics of the origin of the product (such as lipids, acids and aldehydes) Or loss makes it difficult for many analytical methods based on organic acids, alcohols, and aldehydes (such as IR, GC-MS, GC, and HPLC) to make breakthroughs in time adaptation

However, some methods based on element composition and content (such as ICP-MS, stable isotope mass spectrometry) are subject to high equipment prices, high operating technical requirements, and large fluctuations of each element in different batches of samples (mainly including the mixing of raw material sources). , production water is affected by factors such as seasonal changes, etc., there is no successful identification case of counterfeit product production under the conditions of origin, and there are inherent defects in the method of spatial adaptation

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