Method for identifying tea-leaf origin by infrared spectrum

Abstract

The invention provides a method for identifying production place of tea by using infrared spectrum technology, which comprises the following steps: production place typical lines of tea in place of origin are constructed; B. detecting sample: tea samples to be detected are taken and detected under the same condition with the standard sample respectively to obtain standard mid-infrared spectrums, average deviations between the tea samples and reference tea in production place are calculated according to the spectrums, and difference values between the average deviations and the production place typical lines are calculated, if the difference value is within standard deviation range, the tea sample belongs to the production place, otherwise, the tea sample does not belong to the production place. The method has the following advantages: 1. the analyzing result is not affected by subjective consciousness, thereby providing an impersonal evaluation criterion; 2. according to similarity theory, the average deviation can represent the difference between infrared spectrums of tea more accurately; 3. component separation, extraction and the like on tea are not needed before detecting infrared spectrum of the tea, which simplifies the operation, greatly improves the analyzing speed and reduces the detecting cost without environment pollution.

Description

A Method for Identifying the Place of Origin of Tea Using Infrared Spectrum Technology technical field The invention relates to a method for identifying the origin of tea with infrared spectrum technology, belonging to the technical field of spectral analysis. Background technique Tea is one of the most consumed beverages in the world today. With the continuous increase in the output and trade volume of tea products, quickly identifying the origin, authenticity, and adulteration of tea has direct practical significance for maintaining the Chinese tea brand and improving the quality of tea. . Traditional tea identification methods are sensory evaluation and chemical methods. Among them, the results of sensory evaluation are greatly disturbed by human factors and the external environment, which affects the objectivity of the results; although chemical methods can accurately identify tea leaves, it is time-consuming to measure the contents of various chemical components that...

AI Technical Summary

Problems solved by technology

Although tea and medicinal materials belong to plant samples and have similar situations, the research on the application of infrared spectroscopy in the former is still in its infancy. There are literature reports on the use of near-infrared spectroscopy in the determination of tea components and quality

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