区带毛细管电泳法同时分离分析金银花及其制剂中的8种有机酸

Simultaneous separation and analysis of eight organic acids in honeysuckle and its preparations by capillary zone electrophoresis

  • 摘要: 以Na2B4O7+NaH2PO4(Na2B4O7浓度为30 mmol/L,NaH2PO4浓度为10 mmol/L,pH=8.64)为分离背景溶液,并加入体积分数1.2%的三乙醇胺+0.3%的四氢呋喃+2.0%的异丙醇作为添加剂,20 kV分离电压,326 nm检测波长,3 s进样(3447.38 Pa). 在此条件下,建立了一种新的区带毛细管电泳方法,在17 min内可分离和分析金银花及其制剂中的8种有机酸,即异绿原酸A、1,3-二咖啡酰奎宁酸、1,5-二咖啡酰奎宁酸、绿原酸、异绿原酸B、异绿原酸C、新绿原酸和隐绿原酸,且线性关系良好. 同时,该方法被用于定量分析金银花及其制剂中的8种有机酸,其加标回收率范围为92.6%~106.8%,相对标准偏差不超过5.0%. 所建立的新方法操作简单、分析时间短、准确、可靠,可以为金银花及其制剂中8种有机酸的质量控制提供依据.

     

    Abstract: 30 mmol/L Na2B4O7 and 10 mmol/L NaH2PO4 were the separating background solution (pH=8.64) consisting of 1.2% (V/V) triethanolamine, 0.3% (V/V) tetrahydrofuran, 2.0% (v/v) isopropanol as additives, with the high separation voltage (20 kV), detector wavelength (326 nm) and injection (3 s, 3447.38 Pa). Under this condition, a new capillary zone electrophoresis (CZE) method was developed to separate and analyze eight organic acids (isochlorogenic acid A, 1,3-dicaffeoylquinic acid, 1,5-dicaffeoylquinic acid, chlorogenic acid, isochlorogenic acid B, isochlorogenic acid C, neochlorogenic acid and cryptochlorogenic acid) in honeysuckle and its preparations within 17 minutes, and the linear relationship was good. At the same time, this method applied to the quantitative analysis of eight organic acids in honeysuckle and its preparations. The recovery rate of each organic acid in the sample was 92.6% to 106.8%, and the relative standard deviation was not more than 5.0%. The established method is simple to operate, short in analysis time, and can provide a basis for the quality control of eight organic acids in honeysuckle and its preparations.

     

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