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山道年(Santonin)的含量测定,文献所载有容量法、旋光法、重量法等,但一般采用的仍偏重于重量法。Fromme的结晶法至今仍被广泛采作依据。但在分析结果上有的方法需要加校正数,有的用样品量很大,费时亦长。近年来关于山道年的比色方法作了不少工作,日人山口一孝与山岸正治曾进行了2,4二硝基苯肼比色法,前者利用山道年与2,4二硝基苯肼作成苯腙沉淀然后溶解比色,后者利用山道年与2,4二硝基苯肼作成苯腙,不需沉淀及滤取,放置一夜后,通过填满氧化铝之吸附柱,
The content of Santonin is determined by the volume method, polarimetry, gravimetric method, etc., but it is generally used in the weight method. Fromme’s crystallization method is still widely used today. However, there are methods to add corrections to the results of the analysis. Some use large quantities of samples and take a long time. In recent years, a lot of work has been done on the colorimetric method of the Year of the Mountain. Japanese nick Yamaguchi Yamaguchi and Yamashita Masaharu performed the 2,4 dinitrophenyl hydrazine colorimetric method. The former uses yamamoto years and 2,4 dinitrophenyl hydrazine. Preparation of phenylhydrazine precipitation and dissolution of colorimetry, the latter use of mountain road with 2,4 dinitrophenylhydrazine as benzoquinone, without precipitation and filtration, placed overnight, through the adsorption column filled with alumina,