何平, 宋俊峰, 过玮. 马蔺子素的单扫描示波极谱法测定J. 药学学报, 2002, 37(3): 207-209.
引用本文: 何平, 宋俊峰, 过玮. 马蔺子素的单扫描示波极谱法测定J. 药学学报, 2002, 37(3): 207-209.
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HE Ping, SONG Jun-feng, GUO Wei. DETERMINATION OF IRISQUINONE BY SINGLE SWEEP OSCILLOPOLAROGRAPHYJ. Acta Pharmaceutica Sinica, 2002, 37(3): 207-209.
Citation: HE Ping, SONG Jun-feng, GUO Wei. DETERMINATION OF IRISQUINONE BY SINGLE SWEEP OSCILLOPOLAROGRAPHYJ. Acta Pharmaceutica Sinica, 2002, 37(3): 207-209.
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马蔺子素的单扫描示波极谱法测定

DETERMINATION OF IRISQUINONE BY SINGLE SWEEP OSCILLOPOLAROGRAPHY

    摘要
  • 摘要: 目的建立测定马蔺子素的极谱法。方法单扫描示波极谱法。结果在8.0×10-3 mol·L-1 Na2B4O7-1.6×10-2 mol·L-1 KH2PO4 (pH 7.7)支持电解质中,马蔺子素有一灵敏的极谱还原波,其峰电位Ep=-1.23 V(vs SCE),二阶导数峰电流ip″与马蔺子素浓度为1.5×10-7～5.2×10-6 mol·L-1呈良好线性关系(γ=0.9992,N=9),检出限为6.0×10-8 mol·L-1。13次测量2.0×10-6 mol·L-1马蔺子素还原波二阶导数峰峰电流,相对标准偏差RSD为0.87%。结论该方法灵敏、简便、快速,可用于原料药及胶囊中马蔺子素含量的测定。

     

    Abstract: AIMTo propose a polarographic method for the determination of irisquinone. METHODSA reduction wave of irisquinone was recorded by single sweep oscillopolarography. RESULTSIn 8.0×10-3 mol·L-1 Na2B4O7-1.6×10-2 mol·L-1 KH2PO4 (pH 7.7) supporting electrolyte, a reduction wave of irisquinone with peak potential -1.23 V (vs SCE) achieved high sensitivity. The 2nd-order derivative peak current of the reduction wave was proportional to irisquinone concentration in the range of 1.5×10-7～5.2×10-6 mol·L-1 (γ=0.9992, N=9). The detection limit was 6.0×10-8 mol·L-1. Relative standard deviation (RSD) was 0.87% by performing 13 independent measurements on 2.0×10-6 mol·L-1 irisquinone. CONCLUSIONThe proposed method was sensitive, simple, rapid, and can be applied to the determination of irisquinone in raw medicine and capsule.

     

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