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测定利福平有关物质HPLC方法的建立及确证

朱斌**, 胡昌勤*   

  1. 中国药品生物制品检定所, 北京 100050
  • 收稿日期:2001-09-14 修回日期:2001-12-10 出版日期:2002-03-15 发布日期:2002-03-15
  • 通讯作者: 胡昌勤*

Development and Validation of Liquid Chromatographic Method for the Determination of the Related Substances of Rifampicin

Zhu Bin, Hu Changqin*   

  1. Department of Antibiotics, National Institute for the Control of Pharmaceutical and Biological Products, Beijing 100050
  • Received:2001-09-14 Revised:2001-12-10 Online:2002-03-15 Published:2002-03-15
  • Contact: Hu Changqin*

摘要: 利福平为临床中治疗结核的基本药物。其中可能的引入杂质有利福霉素SV、醌式利福平、N 氧化利福平及3-甲酰利福霉素等, 这些化合物多为合成前体或毒性较大成分。为保证利福平质量, 控制其有关物质含量是必要的。USP2 4版、BP98版、EP1997版虽均规定采用HPLC法测定利福平及有关物质的含量, 但尚未见对利福平及其中有关物质的详细分析报道。故测定中无法判断检测到的杂质是已知物还是未知杂质。本文利用利福平杂质对照品, HPLC法测定利福平中有关物质进行方法建立及确证。实验条件:色谱柱:Zorbax Eclipse C8, 4.6×250mm; 检测波长: 254nm; 柱温:25°C; :1mL·min-1; 流动相:乙腈甲醇-0.075mol·mL-1磷酸二氢钾溶液-1.0mol·mL-1枸橼酸溶液(31:31:35:3)。在0.0006mg·mL-1-0.08mg·mL-1浓度范围, 醌式利福平、利福霉素SVN 氧化利福平、3-甲酰利福霉素进样量与峰面积均呈现良好线性关系(r≥0.9999)。对线性范围内的高、中、低浓度溶液的进样精密度进行考察, 结果显示精密度具有浓度依赖性。上述杂质的检测限分别为0.80.80.90.9ng;定量限分别为8797ng。实验对方法的准确性进行了考察, 结果准确; 以乙腈为溶剂, 5小时内利福平及其相关物质溶液的稳定性良好。

关键词: 利福平, 有关物质, HPLC

Abstract: A number of HPLC methods have been approved for the determination of rifampicin, but no references involved the assay of related substances of rifampicin. In the present paper, a reversed-phase liquid chromatographic method for the determination of related substances of rifampicin is developed and validated. Rifampicin and its related substances, including rifamycin SV, rifampicin N-oxide and 3-formylrifamycin SV were separated using a Zorbax Eclipse C8, 250×4.6 mm (i.d), 5 μm column by isocratic elution at a flow rate of 1 mL·min-1. The detector was set at 254 nm. The mobile phase is a mixture of methanol-acetonitrile -0.075 mol·L-1 monopotassium phosphate -1.0 mol·L-1 citric acid (31:31:35:3, v/v). The method validation included accuracy, precision, linearity, sensitivity and stability. All results are shown to be acceptable.

Key words: Rifampicin, Rifampicin, Related substances, Related substances, HPLC, HPLC

Supporting:

*Corresponding author. Tel.: +86-010-67017755-308; Fax: +86-010-65115148; E-mail: hucq@nicpbp.org.cn
**Department of Antibiotics , Guangxi Institute for the Control of Pharmaceutical Products, Nanning 530021