山药炮制后常与天花粉及用甘薯加工制成的山药伪品混淆。我们应用四溶剂紫外光谱谱线组法、高效掖相色谱法对其鉴别,方法可靠,重现性好。 After processing, yam is often confused with trichosanthin and yam counterfeit products made from sweet potato. We use four-solvent ultraviolet spectroscopy line group method and high-performance helium-phase chromatography to identify the method. The method is reliable and has good reproducibility.