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
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
基于超高效液相色谱-串联四极杆飞行时间高分辨质谱(ultra-high performance liquid chromatographytriple quadrupole-time of flight tandem mass spectrometry,UPLC-Triple-TOF MS/MS)法对巴氏杀菌乳中的磷脂成分进行分析鉴定。采用...基于超高效液相色谱-串联四极杆飞行时间高分辨质谱(ultra-high performance liquid chromatographytriple quadrupole-time of flight tandem mass spectrometry,UPLC-Triple-TOF MS/MS)法对巴氏杀菌乳中的磷脂成分进行分析鉴定。采用色谱柱ACQUITY UPLC^®BEH C18(2.1 mm×100 mm,1.7μm),以流动相A水-甲醇-乙腈(1∶1∶1,V/V)和流动相B异丙醇-乙腈(1∶1,V/V)进行梯度洗脱,在电喷雾电离正模式下采集数据。依据高分辨质谱提供的保留时间、准分子离子、二级碎片等脂质分析数据,并结合标准品碎裂方式等信息,共鉴定出磷脂分子68种。其中,磷脂酰胆碱22种,占比7.98%;磷脂酰乙醇胺17种,占比56.60%;磷脂酰丝氨酸10种,占比1.70%;磷脂酰肌醇7种,占比1.33%;鞘磷脂12种,占比32.39%。本研究采用灵敏度高、精密度及稳定性良好的UPLC-Triple-TOF MS/MS方法实现了对牛乳中磷脂的全面定性与定量分析。此方法检测出的牛乳磷脂信息完整、磷脂种类多于其他检测技术,可为牛乳的磷脂研究提供数据基础。展开更多
佛手作为一种药食两用的柑桔类水果,香豆素类化合物是其关键的生物活性成分之一。由于香豆素类化合物结构相似,并且有同分异构体,目前还没有快速准确的方法针对香豆素类化合物进行同时定量。该研究建立了一种超高效液相色谱三重四极杆...佛手作为一种药食两用的柑桔类水果,香豆素类化合物是其关键的生物活性成分之一。由于香豆素类化合物结构相似,并且有同分异构体,目前还没有快速准确的方法针对香豆素类化合物进行同时定量。该研究建立了一种超高效液相色谱三重四极杆质谱法(ultra-performance liquid chromatography tandem triple quaternary mass spectrometry,UPLC-QqQ-MS/MS),在14 min内定性并定量4个不同产地佛手柑中的41种香豆素类化合物,包括16种简单香豆素、23种呋喃香豆素和2种其他香豆素,其中有8组同分异构体。该方法灵敏度高、准确度高、精确度高,可用于佛手实际样品中香豆素的筛选和测定,这是迄今为止筛查并定量香豆素最全面和快速的方法。柠檬内酯是佛手中含量最高的香豆素,浙江佛手中检出的香豆素类化合物含量和种类均最多,并且有4种香豆素在佛手中首次检出。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
文摘佛手作为一种药食两用的柑桔类水果,香豆素类化合物是其关键的生物活性成分之一。由于香豆素类化合物结构相似,并且有同分异构体,目前还没有快速准确的方法针对香豆素类化合物进行同时定量。该研究建立了一种超高效液相色谱三重四极杆质谱法(ultra-performance liquid chromatography tandem triple quaternary mass spectrometry,UPLC-QqQ-MS/MS),在14 min内定性并定量4个不同产地佛手柑中的41种香豆素类化合物,包括16种简单香豆素、23种呋喃香豆素和2种其他香豆素,其中有8组同分异构体。该方法灵敏度高、准确度高、精确度高,可用于佛手实际样品中香豆素的筛选和测定,这是迄今为止筛查并定量香豆素最全面和快速的方法。柠檬内酯是佛手中含量最高的香豆素,浙江佛手中检出的香豆素类化合物含量和种类均最多,并且有4种香豆素在佛手中首次检出。