徐孔燊, 周同惠. 生物碱的安培滴定 Ⅰ.黄连中生物碱含量测定J. 药学学报, 1965, 12(3): 171-175.
引用本文: 徐孔燊, 周同惠. 生物碱的安培滴定 Ⅰ.黄连中生物碱含量测定J. 药学学报, 1965, 12(3): 171-175.
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XU LI-XIN AND ZHOU TONG-HUI (D.T.-W. CHOW), . AMPEROMETRIC TITRATION OF ALKALOIDS Ⅰ. DETERMINATION OF COPTIS ALKALOIDSJ. Acta Pharmaceutica Sinica, 1965, 12(3): 171-175.
Citation: XU LI-XIN AND ZHOU TONG-HUI (D.T.-W. CHOW), . AMPEROMETRIC TITRATION OF ALKALOIDS Ⅰ. DETERMINATION OF COPTIS ALKALOIDSJ. Acta Pharmaceutica Sinica, 1965, 12(3): 171-175.
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生物碱的安培滴定 Ⅰ.黄连中生物碱含量测定

AMPEROMETRIC TITRATION OF ALKALOIDS Ⅰ. DETERMINATION OF COPTIS ALKALOIDS

    摘要
  • 摘要: 本文报告了黄连中生物碱的安培滴定测定方法,将生药样品用pH2.6缓冲液浸泡后,过滤,滤液加NaOH碱化,再用乙醚提取,然后在-0.4伏特外加电位,0.05-0.2M K2SO4中,用硅钨酸进行滴定.本法结果与文献方法一致,平均偏差低于2%.

     

    Abstract: A method for the determination of Coptis alkaloids is reported. The sample is ex- tracted with pH 2.6 buffer solution (Na2HPO4-citric acid) in a glass-stoppered flask. After filtering, the filtrate is rendered alkaline with NaOH and total alkaloids are ex- tracted with ether. The content is then determined by amperometric titration with silicotungstic acid at -0.4V(vs S.C.E.) in 0.05-0.2M K2SO4 medium. he average deviation is less than 2%.

     

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