Method for judging whether traditional Chinese medicinal materials and traditional Chinese medicine decoction pieces are subjected to sulfur fumigation

Abstract

The invention discloses a method for judging whether traditional Chinese medicinal materials and traditional Chinese medicine decoction pieces are subjected to sulfur fumigation. According to the method, an X-ray fluorescent spectrometry (XRF) is adopted to determine the contents of nine elements, including S, As, Hg, Cu, Pb, Al, Fe, Co and Cr, in the traditional Chinese medicinal materials and traditional Chinese medicine decoction pieces, so that the condition of sulfur fumigation of the traditional Chinese medicinal materials and traditional Chinese medicine decoction pieces is judged. The method comprises the following steps: firstly adding cellulose, starch and vegetable protein in proportion according to the main components in the traditional Chinese medicinal materials and traditional Chinese medicine decoction pieces to be tested, so as to prepare a blank matrix; accurately adding an S, As, Hg, Cu, Pb, Al, Fe, Co and Cr multielement standard solution into the blank matrix, preparing a simulated standard sample of the traditional Chinese medicinal materials and traditional Chinese medicine decoction pieces through a freeze-drying method, so as to be used for establishing an element standard curve; then performing boric acid edging and tabletting, measuring the contents of S, As, Hg, Cu, Pb, Al, Fe, Co and Cr elements in the traditional Chinese medicinal materials and traditional Chinese medicine decoction pieces through an X-ray fluorescent spectrometry (XRF), and then judging the condition of sulfur fumigation of the sample according to the contents. The method is simple in operation, rapid in measuring, and applicable to the rapid judgment of the traditional Chinese medicinal materials and traditional Chinese medicine decoction pieces subjected to sulfur fumigation.

Description

technical field [0001] The present invention relates to an X-ray fluorescence spectrometry (XRF), in particular to an X-ray fluorescence spectrometry (XRF) for measuring S, As, Hg, Cu, Pb, Al, Fe, Co and Cr multi-element content, based on which the sulfur fumigated samples were judged. Background technique [0002] Sulfur fumigation is a traditional method of curing Chinese herbal medicines, which has the functions of bleaching, anti-mildew, anti-corrosion, insect-proof and drying. However, sulfur fumigation will lead to changes in the active ingredients and metal content of Chinese herbal medicines. In addition, sulfur fumigation will inevitably produce sulfur dioxide residues, which will damage the digestive system and respiratory system of the human body, and also pose potential threats to the liver, kidneys and other organs. The 2015 edition of "Pharmacopoeia of the People's Republic of China" selected acid distillation-alkali titration in titration, ion chromatography ...

AI Technical Summary

Problems solved by technology

However, the titration method is not suitable for Chinese herbal medicines and decoction pieces that are susceptible to redox titration interference and contain organic acids; when spectrometry is applied, the complex and diverse components in Chinese herbal medicines and decoction pieces will interfere with the wavelength and fluorescence intensity, causing the measurement results to appear inaccurate. Deviation; the application of chromatography requires complex pretreatment of Chinese herbal medicines and decoction pieces, cumbersome operation, and high cost of determination

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