A method for identifying ripe Pu-erh tea based on infrared spectroscopy

Abstract

The invention provides a Pu-Er ripe tea recognition method based on an infrared spectrum, which is characterized in that: the method comprises the following steps: A, collect the infrared spectrum in a Pu-Er ripe tea and other typical black teas, process data and build a Pu-Er ripe tea spectrum characteristic basic; B, build a linear discriminator which distinguishes whether a tea is belonged to the Pu-Er ripe tea or not; C, recognize samples of the Pu-Er ripe tea: carry out a same pretreatment to a tea spectrum to check, project the processed data on the characteristic basic, carry out effectively recognize to the Pu-Er ripe tea by the discriminator. The Pu-Er ripe tea can be objectively and effectively recognized according to the differences of infrared spectrum which are caused by the differences of tea types in the invention. The Pu-Er ripe tea recognition method has the following advantages: 1, the analysis result is not affected by subjective consciousness, therefore, an objective evaluation criteria is provided; 2, before the infrared spectrum of the tea is checked, works such as component separation, extraction and the like are not needed to carry out to the tea, the operation is simple and convenient, analysis speed is increased greatly. The checking cost is reduced and the environment is not polluted.

Description

technical field [0001] The invention relates to a method for identifying ripe Pu'er tea based on infrared spectroscopy, which belongs to the technical field of spectral analysis. Background technique [0002] Tea is one of the most popular beverages in the world. my country is the hometown of tea, and tea planting and tea drinking originated in my country. And Pu'er tea is one of the most precious planting resources among the many tea tree species in China, and it has various effects such as lowering blood lipids and losing weight, and is the best health-preserving tea among teas. Due to the similar appearance of ordinary black tea and Pu-erh tea, there is a phenomenon of false ones and shoddy ones in the current tea market. How to quickly and accurately identify the authenticity and quality of tea has gradually attracted people's attention. The commonly used methods for tea quality evaluation include sensory evaluation and physical and chemical methods. The former is eas...

AI Technical Summary

Problems solved by technology

In the above studies, they mainly used infrared spectroscopy to make qualitative distinctions by directly comparing the absorbance of the original spectra of tea leaves, and did not fully consider the influence of experimental conditions on the spectral uncertainty during the sample detection process; they either used off-the-shelf The method of qualitative discrimination can only be used for simple clustering of the same kind of tea, but there is no unified standard for judging it.

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