Method for quickly identifying Ligusticum sinense based on electronic nose

Abstract

The invention relates to a method for quickly identifying Ligusticum sinense based on an electronic nose, which comprises the following steps: (1) respectively pulverizing a certain amount of Ligusticum sinense, ligusticum wallichii and a mixture of Ligusticum sinense and ligusticum wallichii mixed according to a gradient ratio to obtain a plurality of samples; (2) turning on an electronic nose instrument, wherein the electronic nose comprises a plurality of sensors, setting the parameters of the electronic nose as follows: the gas flow rate is 0.5-0.7 L / min, the cleaning time is 160-200s, the detection time is 100-150s, and starting sample introduction determination at 15-30 DEG C to obtain data of each sample in each sensor of the electronic nose; (3) finding out a group of data with the highest significance corresponding to different samples in different sensors, and taking the sensor corresponding to the group of data as a subsequent electronic nose detection sensor, grinding a sample to be detected into powder, and measuring the detection data of the sample to be detected in the sensor according to the conditions in the step (2); and (4) identifying the to-be-detected sample by taking the group of data with the highest significance as characteristic reference values according to the detection data of the electronic nose. The method is simple to operate, identification steps are simplified, and identification time is shortened.

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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