A sensitive and specific liquid chromatography-electrospray ionization tandem mass spectrometric method is described for the determination of alarelin in human plasma by selected reaction monitoring (SRM) mode. The me...A sensitive and specific liquid chromatography-electrospray ionization tandem mass spectrometric method is described for the determination of alarelin in human plasma by selected reaction monitoring (SRM) mode. The method was linear in the concentration range of 0.1 -20μg/L for alarelin. The intra- and inter-day precision was within 9%. The assay aceuraey was within ±1.2%. The method was successfully employed in pharmacokinetic studies after i.m. administration of 75, 150 and 225μg alarelin to 30 healthy female volunteers.展开更多
建立了超高效液相色谱-电喷雾串联质谱（ UPLC-ESI MS／MS）分析生活饮用水中54种药物的方法。采用HLB固相萃取柱对水样中的目标化合物进行富集净化，以5 mL 甲醇洗脱；洗脱液用氮气吹至近干，用0.4 mL 0.1％甲酸水溶液定容，上机分析；...建立了超高效液相色谱-电喷雾串联质谱（ UPLC-ESI MS／MS）分析生活饮用水中54种药物的方法。采用HLB固相萃取柱对水样中的目标化合物进行富集净化，以5 mL 甲醇洗脱；洗脱液用氮气吹至近干，用0.4 mL 0.1％甲酸水溶液定容，上机分析；ACQUITY UPLCTMBEH C18柱用作色谱分离，以0.1％甲酸水溶液-甲醇为流动相进行梯度洗脱；多反应监测（ MRM）模式进行检测；目标药物使用基质外标法定量。54种药物在自备井水、市政末梢水和地表水中的加标回收率分别为58.7％～104.4％、53.1％～109.5％和50.7％～118.8％，相对标准偏差（ n＝6）分别为0.3％～12.8％、1.0％～15.5％和0.4％～19.3％；方法定量限为0.002～5.000 ng／L。将建立的方法应用于北京部分自备井水、市政末梢水和地表水样品的分析，结果在自备井水样中检出26种药物。展开更多
文摘建立了高效液相色谱-电喷雾串联质谱(HPLC-ESI MS/MS)分析环境水样中22种抗生素类药物的方法。采用HLB固相萃取柱对环境水样中的目标化合物进行富集、净化,然后以6mL氨水-甲醇(5∶95,v/v)溶液洗脱。收集的洗脱液经氮气吹干至1mL,然后进行HPLC-ESI MS/MS分离分析。色谱流动相A相为甲醇-乙腈(1∶1,v/v),B相为0.3%(体积分数)甲酸水溶液(含0.1%(体积分数)甲酸铵,pH2.9);色谱柱为XTerra MS C18柱。质谱检测采用正离子扫描,多反应监测模式。分别以自来水和污水作为基质,22种抗生素类药物的加标平均回收率分别为54.9%～130%和57.4%～138%,相对标准偏差(n=3)分别为2.85%～28.6%和2.02%～23.2%;方法的检出限为0.05～0.5ng/L。将建立的方法应用于北京市高碑店湖和小清河水样的分析,结果表明在两个水样中均有部分抗生素类药物检出。
文摘A sensitive and specific liquid chromatography-electrospray ionization tandem mass spectrometric method is described for the determination of alarelin in human plasma by selected reaction monitoring (SRM) mode. The method was linear in the concentration range of 0.1 -20μg/L for alarelin. The intra- and inter-day precision was within 9%. The assay aceuraey was within ±1.2%. The method was successfully employed in pharmacokinetic studies after i.m. administration of 75, 150 and 225μg alarelin to 30 healthy female volunteers.
