Method for detecting bistort rhizome and counterfeit medicinal materials of rhizoma polygoni paleacei and polygonum viviparum

The invention relates to a method for detecting bistort rhizome and counterfeit medicinal materials of rhizoma polygoni paleacei and polygonum viviparum. In one aspect, the invention relates to a method for detecting adulteration in bistort rhizome or a traditional Chinese medicine composition thereof, which uses liquid chromatography-mass spectrometry to determine the bistort rhizome or the traditional Chinese medicine composition thereof. The traditional Chinese medicine composition is prepared from bistort rhizome, common andrographis herb and lightyellow sophora root according to the weight ratio of 140: 100: 170 by the following steps: crushing the bistort rhizome and the common andrographis herb into fine powder, decocting the bitter ginseng in water twice (2 hours for the first time and 1.5 hours for the second time), filtering, concentrating the filtrate into thick paste, uniformly mixing the thick paste with the powder, granulating and drying to obtain the traditional Chinese medicine composition. Th