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
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[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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