四川省及云南省药品标准用220nm波长测定合成天麻素片的含量,由于该波长短于230nm,易受溶剂及杂散光的干扰,重现性差。作者根据天麻素水溶液的吸收特征,选用268nm为测定波长,克服了上述不足,重现性及精密度均有所提高。实验方法与结果一、天麻素水溶液的吸收光谱:取合成 Sichuan Province and Yunnan Province, the standard pharmaceutical use of 220nm wavelength determination of the content of synthetic gastrodin tablets, as the wavelength is shorter than 230nm, susceptible to solvent and stray light interference, poor reproducibility. According to the absorption characteristics of gastrodin aqueous solution, the author chose 268nm as the measuring wavelength to overcome the above shortcomings, and the reproducibility and precision are improved. Experimental methods and results First, the absorption spectrum of gastrodin aqueous solution: take synthetic