A stability-indicating liquid chromatographic method has been developed and validated for the determination of Diltiazem Hydrochloride(DTZ) together with its six related substances(Diltiazem sulphoxide,Imp-A,Imp-B,Imp...A stability-indicating liquid chromatographic method has been developed and validated for the determination of Diltiazem Hydrochloride(DTZ) together with its six related substances(Diltiazem sulphoxide,Imp-A,Imp-B,Imp-D,Imp-E,and Imp-F) in a laboratory mixture as well as in a novel tablet formulation developed in-house.Efficient chromatographic separation was achieved on a Hypersil BDS C18(150 mm*4.6 mm,5.0 μm) with mobile phase containing 0.2% Triethylamine(TEA) in gradient combination with acetonitrile(ACN) at a flow rate of 1.0 mL/min and the eluent was monitored at 240 nm.In the developed method,the resolution of DTZ from any pair of impurities was found to be greater than 2.0.The test solution and related substances were found to be stable in the diluent for 24 h.The developed method resolved the drug from its known impurities,stated above,and also from additional impurities generated when the formulation was subjected to forced degradation;the mass balance was found close to 99.9%.Regression analyses indicate correlation coefficient value greater than 0.997 for DTZ and its six known impurities.The LOD for DTZ and the known impurities was at a level below 0.02%.The method has shown good,consistent recoveries for DTZ(99.8-101.2%) and also for its six known impurities(97.2-101.3%).The method was found to be accurate,precise,linear,specific,sensitive,rugged,robust,and stability-indicating.展开更多
目的:建立高效液相色谱-串联质谱(HPLC-MS/MS)法测定盐酸曲唑酮中相关杂质的含量。方法:采用Agilent ZORBAX Eclipse Plus C_(18)色谱柱(2.1 mm×100 mm, 1.8μm),以0.1%甲酸溶液-乙腈为流动相,梯度洗脱,流速0.2 mL·min^(-1),...目的:建立高效液相色谱-串联质谱(HPLC-MS/MS)法测定盐酸曲唑酮中相关杂质的含量。方法:采用Agilent ZORBAX Eclipse Plus C_(18)色谱柱(2.1 mm×100 mm, 1.8μm),以0.1%甲酸溶液-乙腈为流动相,梯度洗脱,流速0.2 mL·min^(-1),柱温30℃,采用电喷雾离子化源(ESI),多反应检测(MRM)模式,正离子模式扫描。结果:测定了盐酸曲唑酮原料药中的5个相关杂质,分别为三唑并吡啶酮、曲唑酮-N-氧化物、脱氯曲唑酮、4-乙基曲唑酮、曲唑酮异丁醚类似物,杂质在测定的质量浓度范围内线性关系良好,r均≥0.999 5;平均回收率为91.9%~99.4%,RSD≤3.9%;测定的3批原料药中均检出了曲唑酮N-氧化物和脱氯曲唑酮,其中2批还检测到极微量的4-乙基曲唑酮。结论:建立的方法可测定盐酸曲唑酮原料药中的5种相关杂质,能更有效的评估和控制其质量。展开更多
目的:采用反相液相色谱法测定巴洛沙星胶囊含量及有关物质。方法:采用 PICO TAG ^(TM)C_(18)色谱柱(5μm,3.9mm×150mm),以乙腈-水-十二烷基硫酸钠(400∶600∶2.5,用磷酸调节pH为3.0)为流动相;流速1.0mL·min^(-1);检测波长为29...目的:采用反相液相色谱法测定巴洛沙星胶囊含量及有关物质。方法:采用 PICO TAG ^(TM)C_(18)色谱柱(5μm,3.9mm×150mm),以乙腈-水-十二烷基硫酸钠(400∶600∶2.5,用磷酸调节pH为3.0)为流动相;流速1.0mL·min^(-1);检测波长为290nm,柱温:室温;进样量:20μL。结果:在该色谱条件下,巴洛沙星浓度在15-35μg·mL^(-1)范围内具有良好的线性关系,r=0.9999,精密度 RSD 为0.81%(n=6);巴洛沙星胶囊含量测定高、中、低3种浓度的回收率分别为98.3%,100.4%,99.9%;RSD分别为0.56%,0.62%,0.54%。结论:本法简便、快速、准确,专属性好。展开更多
文摘A stability-indicating liquid chromatographic method has been developed and validated for the determination of Diltiazem Hydrochloride(DTZ) together with its six related substances(Diltiazem sulphoxide,Imp-A,Imp-B,Imp-D,Imp-E,and Imp-F) in a laboratory mixture as well as in a novel tablet formulation developed in-house.Efficient chromatographic separation was achieved on a Hypersil BDS C18(150 mm*4.6 mm,5.0 μm) with mobile phase containing 0.2% Triethylamine(TEA) in gradient combination with acetonitrile(ACN) at a flow rate of 1.0 mL/min and the eluent was monitored at 240 nm.In the developed method,the resolution of DTZ from any pair of impurities was found to be greater than 2.0.The test solution and related substances were found to be stable in the diluent for 24 h.The developed method resolved the drug from its known impurities,stated above,and also from additional impurities generated when the formulation was subjected to forced degradation;the mass balance was found close to 99.9%.Regression analyses indicate correlation coefficient value greater than 0.997 for DTZ and its six known impurities.The LOD for DTZ and the known impurities was at a level below 0.02%.The method has shown good,consistent recoveries for DTZ(99.8-101.2%) and also for its six known impurities(97.2-101.3%).The method was found to be accurate,precise,linear,specific,sensitive,rugged,robust,and stability-indicating.
文摘目的:建立高效液相色谱-串联质谱(HPLC-MS/MS)法测定盐酸曲唑酮中相关杂质的含量。方法:采用Agilent ZORBAX Eclipse Plus C_(18)色谱柱(2.1 mm×100 mm, 1.8μm),以0.1%甲酸溶液-乙腈为流动相,梯度洗脱,流速0.2 mL·min^(-1),柱温30℃,采用电喷雾离子化源(ESI),多反应检测(MRM)模式,正离子模式扫描。结果:测定了盐酸曲唑酮原料药中的5个相关杂质,分别为三唑并吡啶酮、曲唑酮-N-氧化物、脱氯曲唑酮、4-乙基曲唑酮、曲唑酮异丁醚类似物,杂质在测定的质量浓度范围内线性关系良好,r均≥0.999 5;平均回收率为91.9%~99.4%,RSD≤3.9%;测定的3批原料药中均检出了曲唑酮N-氧化物和脱氯曲唑酮,其中2批还检测到极微量的4-乙基曲唑酮。结论:建立的方法可测定盐酸曲唑酮原料药中的5种相关杂质,能更有效的评估和控制其质量。