Binary adulterate angelica sinensis quantitative analysis method based on near infrared spectrum and chemometrics

A technique of chemometrics and near-infrared spectroscopy, applied in the field of traditional Chinese medicine analysis, can solve problems such as information distortion and unsatisfactory smoothing effect, and achieve accurate identification

Inactive Publication Date: 2019-05-17
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

SG smoothing, first-order derivative and second-order derivative all use the number of windows as an important parameter. If the number of windows is too

Method used

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  • Binary adulterate angelica sinensis quantitative analysis method based on near infrared spectrum and chemometrics
  • Binary adulterate angelica sinensis quantitative analysis method based on near infrared spectrum and chemometrics
  • Binary adulterate angelica sinensis quantitative analysis method based on near infrared spectrum and chemometrics

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Embodiment

[0028] This example is applied to the quantitative analysis of the binary adulterated samples of Angelica sinensis, using the method of near-infrared spectroscopy combined with chemometrics. The specific steps are as follows:

[0029] 1) Preparation of samples

[0030] 40 batches of Angelica sinensis and 39 batches of Duhuo were purchased from 40 different pharmacies in Tianjin. Firstly, Chinese herbal medicines are pulverized with a pulverizer, and then passed through a 120-mesh sieve, and the collected fine powder is put into a paper bag for drying. The counterfeit product of Angelica sinensis and Chinese angelica powder were mixed evenly in different proportions to obtain binary adulterated samples, in which the single product matched with Angelica sinensis in each group was pure. The concentration range of angelica and lovage is 0-100%, of which the interval of 0-3% is 1%, the interval of 5-95% is 5%, and the interval of 97-100% is 1%. Different pure products are used in...

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Abstract

The invention discloses a binary adulterate angelica sinensis quantitative analysis method based on near infrared spectrum and chemometrics. The method comprises the specific steps of purchasing someangelica sinensis and similar products, and preparing a certain number of angelica sinensis adulterate samples; collecting near infrared diffuse reflection spectrum of the adulterate samples; dividinga data set into a training set and a prediction set in a KS grouping mode; determining the number of factors of a partial least squares regression model; inspecting preprocessing effects of an SC smoothing method, a multiplicative scatter correction method, a standard normal variable method, a first-order derivative method, a second-order derivative method, a continuous wavelet transform method and combinations of the methods, thereby obtaining the optimum preprocessing method; and carrying out quantitative analysis on binary adulterate angelica sinensis through adoption of the optimum preprocessing-PLSR modeling method. On the basis of the near infrared spectrum and the chemometrics, the method is rapid, simple and convenient, and the samples are not damaged. The method is applicable tothe quantitative analysis of the binary adulterate angelica sinensis.

Description

technical field [0001] The invention belongs to the quantitative analysis technology of angelica sinensis in the field of traditional Chinese medicine analysis, and relates to a quantitative analysis method for binary adulterated angelica sinensis based on near-infrared spectroscopy and chemometrics. Background technique [0002] Angelica is a Umbelliferae plant, mainly distributed in alpine and rainy mountainous areas. Angelica can not only replenish blood and activate blood, but also dredge meridians and collaterals, and is widely used in many aspects such as debilitating anemia, abdominal pain due to deficiency and cold, rheumatism paralysis, regulating menstruation and relieving pain. However, due to the lack of drug resources, high drug prices and large demand, adulteration of angelica is common in the market. Common fakes of angelica include Duhuo, Chuanxiong, and Atractylodes macrocephala, which are similar in shape and difficult to distinguish with the naked eye. Mi...

Claims

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Application Information

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IPC IPC(8): G01N21/359G01N21/3563
Inventor 卞希慧张萌朱柏睿
Owner TIANJIN POLYTECHNIC UNIV
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