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
[目的]建立同时检测配合饲料中64种药物的超高效液相色谱-三重四极杆串联质谱(ultra-high performance liquid chromatography-triple quadrupole tandem mass spectrometry,UHPLC-MS/MS)法,提高非法添加物的检测效率。[方法]采用Waters...[目的]建立同时检测配合饲料中64种药物的超高效液相色谱-三重四极杆串联质谱(ultra-high performance liquid chromatography-triple quadrupole tandem mass spectrometry,UHPLC-MS/MS)法,提高非法添加物的检测效率。[方法]采用Waters HSS T3型色谱柱(2.1 mm×100 mm,1.8μm)进行分离,流动相A为0.1%甲酸水溶液,流动相B为含0.1%甲酸的乙腈溶液,梯度洗脱,流速为0.40 mL/min,进样量为2μL;采用电喷雾离子源正离子扫描模式进行检测,多反应监测模式进行信号采集。比较4种样品提取溶剂以及2种固相萃取柱处理对目标药物的回收率,确定样品前处理的最佳方法。利用建立的UHPLC-MS/MS法对宁夏回族自治区不同来源的100批次配合饲料样品进行64种药物检测。[结果]配合饲料样品均质后,用含0.2%甲酸的乙腈水溶液(乙腈∶水=8∶2,V/V)提取,利用Oasis PRiME HLB型固相萃取柱对样品净化,多数目标药物的回收率在60%以上。64种药物在浓度为5.0~200.0μg/L的范围内线性关系良好,相关系数(R)均大于0.99;不同药物的定量限在5.0~10.0μg/kg;阳性添加5.0、20.0、50.0μg/kg 3个浓度的平均回收率在41.00%~120.49%,批内相对标准偏差(RSD)在0.54%~15.94%,批间RSD在1.25%~13.64%。在100个批次的配合饲料样品中均未检出目标药物。[结论]建立的UHPLC-MS/MS法线性关系良好、回收率高、精密度好,具有较高的重现性和较好的可操作性,可用于配合饲料中非法添加64种药物的筛查。展开更多
使用超高效液相色谱-串联质谱法,建立饼干中大麻酚、大麻二酚和四氢大麻酚的测定方法。样品经乙腈醋酸(99+1)提取,加入醋酸体系盐包超声离心后,再加入吸附剂离心。采用0.1%甲酸水溶液和甲醇为流动相,梯度洗脱,通过C18色谱柱分离,大气压...使用超高效液相色谱-串联质谱法,建立饼干中大麻酚、大麻二酚和四氢大麻酚的测定方法。样品经乙腈醋酸(99+1)提取,加入醋酸体系盐包超声离心后,再加入吸附剂离心。采用0.1%甲酸水溶液和甲醇为流动相,梯度洗脱,通过C18色谱柱分离,大气压化学电子源(atmospheric pressure chemical ionization,APCI)正离子多反应模式监测。通过考察不同种类提取溶剂、超声时间、萃取盐包组成、吸附剂组成的目标化合物回收率,确定最优前处理方式。结果表明:大麻酚、大麻二酚、四氢大麻酚在2~100 ng/mL时呈现良好线性关系,相关系数(R2)均大于0.999,方法检出限0.01 mg/kg,定量限0.02 mg/kg。低、中、高3个浓度加标回收试验,大麻酚回收率为80.3%~91.1%,相对标准偏差(relative standard deviation,RSD)为2.4%~6.5%,大麻二酚回收率为78.4%~88.5%,RSD为2.9%~7.5%,四氢大麻酚回收率为81.5%~91.3%,RSD为2.6%~6.8%。该方法适用于饼干中大麻酚、大麻二酚和四氢大麻酚的检测。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
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
文摘使用超高效液相色谱-串联质谱法,建立饼干中大麻酚、大麻二酚和四氢大麻酚的测定方法。样品经乙腈醋酸(99+1)提取,加入醋酸体系盐包超声离心后,再加入吸附剂离心。采用0.1%甲酸水溶液和甲醇为流动相,梯度洗脱,通过C18色谱柱分离,大气压化学电子源(atmospheric pressure chemical ionization,APCI)正离子多反应模式监测。通过考察不同种类提取溶剂、超声时间、萃取盐包组成、吸附剂组成的目标化合物回收率,确定最优前处理方式。结果表明:大麻酚、大麻二酚、四氢大麻酚在2~100 ng/mL时呈现良好线性关系,相关系数(R2)均大于0.999,方法检出限0.01 mg/kg,定量限0.02 mg/kg。低、中、高3个浓度加标回收试验,大麻酚回收率为80.3%~91.1%,相对标准偏差(relative standard deviation,RSD)为2.4%~6.5%,大麻二酚回收率为78.4%~88.5%,RSD为2.9%~7.5%,四氢大麻酚回收率为81.5%~91.3%,RSD为2.6%~6.8%。该方法适用于饼干中大麻酚、大麻二酚和四氢大麻酚的检测。
