建立基于前处理技术结合液相色谱-串联质谱法(liquid chromatography-tandem mass spectrometry,LC-MS/MS)对鲤鱼基质中苦参碱和氧化苦参碱残留量测定的分析方法.样品采用乙腈均质提取的萃取方式,用硫酸钠作为除水剂,样品经过C18色谱柱...建立基于前处理技术结合液相色谱-串联质谱法(liquid chromatography-tandem mass spectrometry,LC-MS/MS)对鲤鱼基质中苦参碱和氧化苦参碱残留量测定的分析方法.样品采用乙腈均质提取的萃取方式,用硫酸钠作为除水剂,样品经过C18色谱柱分离,以水-乙腈为流动相,基质匹配标准曲线外标法定量.苦参碱和氧化苦参碱在质量浓度范围1—50 ng·mL^(−1)内,具有良好的线性关系,相关系数R^(2)均大于0.99.苦参碱方法检出限为0.21 ng·mL^(−1),定量限为0.69 ng·mL^(−1);氧化苦参碱方法检出限为0.17 ng·mL^(−1),定量限为0.52 ng·mL^(−1).添加浓度水平1.0、2.0、5.0 ng·mL^(−1),平均回收率为72.5%—108.7%,相对标准偏差(relative standard deviation,RSD,n=6)为4.2%—8.2%.苦参碱和氧化苦参碱的基质效应均表现为抑制.该方法前处理方法简单,灵敏度高,稳定性好,适合鲤鱼基质苦参碱和氧化苦参碱残留量的测定,同时为后续同类样品检测提供参考,也为今后相关标准制定提供数据积累.展开更多
Potential mutagenic impurities in Active Pharmaceutical Ingredient, Meropenem Trihydrate were assessed and a novel analytical method for their quantification was developed and validated. This Liquid Chromatographic me...Potential mutagenic impurities in Active Pharmaceutical Ingredient, Meropenem Trihydrate were assessed and a novel analytical method for their quantification was developed and validated. This Liquid Chromatographic method using High Resolution Mass Spectrometer (LC-HRMS) technique is proved to be suitable for simultaneous quantification of all ten identified impurities with required specificity, sensitivity, resolution, precision, accuracy, and other method characteristics as per ICH Guidelines. The acceptable limit of less than 2.9 μg/g was considered for evaluations, based on drug substance dosage and duration of treatment. The method stands most sensitive with a Limit of Detection of 0.35 μg/g, considering the challenge full acceptance criteria as per current regulatory standards.展开更多
文摘Potential mutagenic impurities in Active Pharmaceutical Ingredient, Meropenem Trihydrate were assessed and a novel analytical method for their quantification was developed and validated. This Liquid Chromatographic method using High Resolution Mass Spectrometer (LC-HRMS) technique is proved to be suitable for simultaneous quantification of all ten identified impurities with required specificity, sensitivity, resolution, precision, accuracy, and other method characteristics as per ICH Guidelines. The acceptable limit of less than 2.9 μg/g was considered for evaluations, based on drug substance dosage and duration of treatment. The method stands most sensitive with a Limit of Detection of 0.35 μg/g, considering the challenge full acceptance criteria as per current regulatory standards.