A method for rapid identification of Chaxiong tea based on electronic nose

Abstract

The present invention relates to a method for quickly identifying Chaxiong based on an electronic nose, comprising: (1) powdering a certain amount of Chaxiong, Chuanxiong, and a mixture of Chaxiong and Chuanxiong mixed in gradient proportions to obtain multiple samples; (2) opening Electronic nose instrument, the electronic nose contains multiple sensors; set the parameters of the electronic nose to the gas flow rate of 0.5-0.7L / min, the cleaning time of 160-200s, the detection time of 100-150s, and start the sample injection measurement at 15-30°C. Obtain the data of each sample in each sensor of the electronic nose; (3) Find out a group of data with the highest significance corresponding to different samples in different sensors, and use the sensor corresponding to this group of data as the subsequent electronic nose detection sensor; The test sample is powdered and the detection data of the test sample in the sensor is determined according to the conditions of step (2); (4) According to the electronic nose detection data and a set of data with the highest significance as the characteristic reference value, identify the test sample . The invention has simple operation, simplifies identification steps and shortens identification time.

Description

technical field [0001] The invention relates to the technical field of identification of traditional Chinese medicines, in particular to a method for quickly identifying tea rhizome based on an electronic nose. Background technique [0002] Chaxiong is the dried rhizome of Ligusticum chaxiong in Umbelliferae. It is mainly produced in Ruichang, Wuning, De'an and other counties and cities in Jiujiang, Jiangxi Province. It has a long history of cultivation and medicinal use in Jiangxi. Chaxiong is warm in nature, pungent in taste, non-toxic, and returns to the liver and heart meridian. Chaxiong has a good effect of expelling wind and relieving pain. In local areas, Chaxiong is often used in tea to relieve migraine. [0003] In real life, we found that the medicinal materials and decoction pieces of Chaxiong and Chuanxiong are very similar in appearance, and even the difference in the color and smell of the powder is very small, and it is difficult for non-professionals to dist...

AI Technical Summary

Problems solved by technology

At present, methods such as high-performance liquid chromatography and gas chromatography are often used to detect Chaxiong. Although these methods are feasible, they have the disadvantages of complicated operation process (professional operation is required), time-consuming, etc., and it is difficult to distinguish the mixture of Chaxiong and Chuanxiong. Difficult to apply to the rapid circulation of the market

Therefore, there is no objective, scientific and quick method to evaluate the authenticity of Chaxiong and Chuanxiong.

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