Authenticity identification method for puer old-tree tea

Abstract

The invention relates to a method for identifying the quality of tea, in particular to a method for identifying the authenticity of ancient Pu'er tea. The authenticity identification method of Pu’er tea ancient tree tea is collected through the standard physical samples of Brown Mountain ancient tree tea, and its trace element characteristic spectrum is measured by ICP‑MS to establish a trace element standard spectrum library; then through statistical analysis, the characteristic elements are screened; based on support Optimizing the parameters of the vector machine to establish a model for identifying authenticity and counterfeiting of Brown Mountain ancient tree tea. The method for identifying the authenticity of ancient Pu-erh tea tea provided by the present invention breaks through the practical limitation that traditional sensory evaluation and identification methods are difficult to identify counterfeit ancient Pu-erh tea. By measuring the characteristic spectral data of the trace elements of the tea to be identified and inputting it into the authenticity identification model, the identity information of the tea can be quickly and accurately obtained, reducing the risk of human misjudgment.

Description

technical field [0001] The invention relates to a method for identifying the quality of tea, in particular to a method for identifying the authenticity of ancient Pu'er tea. Background technique [0002] Pu'er tea is a geographical indication product, mainly made from large-leaf species from Yunnan, sun-dried, and made through a specific fermentation process. Tea raw materials are the basis for the taste, flavor and soup color of Pu-erh tea, and the prices of tea from different origins vary greatly. Among them, Laobanzhang of Bulang Mountain in Xishuangbanna is the most famous. The oldest tree is more than 400 years old. It belongs to high-end tea and has been included in the six ancient tree tea protection areas in Yunnan. The Terrace tea garden is an artificially selected variety, which is planted contiguously and has high yields. It requires artificial fertilization and spraying, and is a raw material for low-end Pu-erh tea. Due to the good quality and high price of old...

AI Technical Summary

Problems solved by technology

In recent years, more and more researchers have begun to use instrumental analysis and fingerprinting to trace the origin of tea. Common techniques include chromatographic fingerprinting, near-infrared spectroscopy, infrared spectroscopy, and plasma emission spectroscopy-mass spectroscopy. Spectral fingerprinting , but there are not many identification technologies applied to ancient Pu-erh tea. Only Lin Xin et al. established a method based on rare earth element fingerprint analysis to distinguish Pu-erh ancient tree tea and mesa tea. This method only uses rare earth elements as characteristic elements, and the variable factor is small. , the modeling accuracy is related to the sample size of ancient tree tea and platform tea used