An ultrahigh performance liquid chromatography-triple quadrupole tandem mass spectrometry(UPLC-MS/MS)was established to quickly and accurately determine the content of oleuropein in cosmetics.The samples were extracte...An ultrahigh performance liquid chromatography-triple quadrupole tandem mass spectrometry(UPLC-MS/MS)was established to quickly and accurately determine the content of oleuropein in cosmetics.The samples were extracted with methanol-aqueous solution,and the mobile phase with methanol-formic acid solution(0.1 mol/L)=40∶60 was separated by Agilent ZORBAX Eclipse Plus C18(2.1 mm×50 mm×1.8μm-Micron)column temperature 30℃,flow rate 0.3 mL/min.The MS end was detected by electrospray negative mode ionization(ESI-)and multiple reaction monitoring(MRM)mode.The results show a good linear relationship in the range of 0.002~5 mg/L,with a correlation coefficient R2 of 0.999,5.Method recovery range from 84.2%~107.6%and the relative standard deviation RSD is 5.8%.The detection time is 5 min,the detection limit is 0.000,6 mg/L,and the limit of quantification is 0.002 mg/L.This method has the advantages of convenient operation,low quantification limit,high precision and good repeatability,and is suitable for measuring the content of oleuropein in many kinds of cosmetics.展开更多
基于超高效液相色谱-串联三重四极杆质谱法建立含乳成分的特殊医学用途配方食品中6种季铵盐类消毒剂残留的检测分析方法。使用80%乙腈水溶液作为提取溶液对样品进行提取,采用RRHD Eclipse Plus C_(18)色谱柱进行分离,选择电喷雾离子源,...基于超高效液相色谱-串联三重四极杆质谱法建立含乳成分的特殊医学用途配方食品中6种季铵盐类消毒剂残留的检测分析方法。使用80%乙腈水溶液作为提取溶液对样品进行提取,采用RRHD Eclipse Plus C_(18)色谱柱进行分离,选择电喷雾离子源,在正离子模式下(ESI+)采用多反应监测模式进行检测,用基质匹配工作曲线进行定量。结果表明:6种季铵盐类消毒剂在0.1~5.0 ng/mL质量浓度范围内具有良好的线性关系,线性相关系数>0.9960,检出限为0.5μg/kg,定量限为1μg/kg;固体基质中加标回收率为72.8%~102.3%,相对标准偏差(relative standarddeviation,RSD)为0.25%~3.88%;液体基质中加标回收率为71.8%~100.8%,RSD为0.19%~2.51%。方法简单、高效、快捷、灵敏,能够很好地用于特殊医学用途配方食品中季铵盐类消毒剂的分析测定。展开更多
Curcumin,a safe natural yellow pigment with a wide range of pharmacological activities,is used both in herbal drugs and as a food coloring agents.Studies have shown that curcumin would suffer from extensive metabolism...Curcumin,a safe natural yellow pigment with a wide range of pharmacological activities,is used both in herbal drugs and as a food coloring agents.Studies have shown that curcumin would suffer from extensive metabolism in vivoand the predominant metabolic pathways are reduction and conjugation.In order to comprehensively study the metabolism and enrich the metabolic profile of cxurcumin in vivo,we carried out this research.A systematic method with highly sensitive UPLC-Q/TOF-MS was established to analyze different biological samples of rats after展开更多
文摘An ultrahigh performance liquid chromatography-triple quadrupole tandem mass spectrometry(UPLC-MS/MS)was established to quickly and accurately determine the content of oleuropein in cosmetics.The samples were extracted with methanol-aqueous solution,and the mobile phase with methanol-formic acid solution(0.1 mol/L)=40∶60 was separated by Agilent ZORBAX Eclipse Plus C18(2.1 mm×50 mm×1.8μm-Micron)column temperature 30℃,flow rate 0.3 mL/min.The MS end was detected by electrospray negative mode ionization(ESI-)and multiple reaction monitoring(MRM)mode.The results show a good linear relationship in the range of 0.002~5 mg/L,with a correlation coefficient R2 of 0.999,5.Method recovery range from 84.2%~107.6%and the relative standard deviation RSD is 5.8%.The detection time is 5 min,the detection limit is 0.000,6 mg/L,and the limit of quantification is 0.002 mg/L.This method has the advantages of convenient operation,low quantification limit,high precision and good repeatability,and is suitable for measuring the content of oleuropein in many kinds of cosmetics.
基金partly supported by National Natural Science Foundation of China(No.81430095)also by Special National Program on Key Basic Research Project(No.2014CB560706)
文摘Curcumin,a safe natural yellow pigment with a wide range of pharmacological activities,is used both in herbal drugs and as a food coloring agents.Studies have shown that curcumin would suffer from extensive metabolism in vivoand the predominant metabolic pathways are reduction and conjugation.In order to comprehensively study the metabolism and enrich the metabolic profile of cxurcumin in vivo,we carried out this research.A systematic method with highly sensitive UPLC-Q/TOF-MS was established to analyze different biological samples of rats after