[Objectives]The paper was to establish a rapid screening method of pesticide residues in strawberry based on HPLC-QTOF/MS SWATH acquisition mode.[Methods]The strawberry sample was extracted with acetonitrile,purified ...[Objectives]The paper was to establish a rapid screening method of pesticide residues in strawberry based on HPLC-QTOF/MS SWATH acquisition mode.[Methods]The strawberry sample was extracted with acetonitrile,purified with anhydrous magnesium sulfate,sodium chloride and primary secondary amine(PSA)powder,and then loaded on the machine.The full information spectrum was collected by positive ion mode and screened by comparing with the spectrum library,and 20 kinds of pesticide residues were quantitatively analyzed.[Results]The detection limits of 20 pesticide residues were 0.0002-0.0100 mg/kg,and they showed good linearity in the range of 0.0005-0.1000μg/mL(R 2≥0.995).The recoveries ranged from 62.8%to 106.3%.[Conclusions]This method is rapid,simple,sensitive and non-targeted,and can be used for rapid screening of multiple pesticide residues in strawberry.展开更多
利用超高效液相色谱-四极杆-飞行时间高分辨质谱(ultra performance liquid chromatography-quadrupole-time of flight high resolution mass spectrometry,UPLC-Q-TOF-HRMS)技术结合所有理论碎片离子的连续窗口采集(sequential window...利用超高效液相色谱-四极杆-飞行时间高分辨质谱(ultra performance liquid chromatography-quadrupole-time of flight high resolution mass spectrometry,UPLC-Q-TOF-HRMS)技术结合所有理论碎片离子的连续窗口采集(sequential window acquisition of all theoretical fragment ions,SWATH)模式,采用特征二级碎片离子峰面积进行外标法定量,建立了一种快速、灵敏同时测定柠檬中13种类黄酮、8种香豆素和呋喃香豆素、2种类柠檬苦素和3种酚酸物质的方法,并对6个品种柠檬果实的果皮、果肉和果汁中这26种生物活性成分进行了定量分析。方法学考察结果显示,该方法具有良好的线性关系、灵敏度、精密度和准确度:线性方程的相关系数均在0.99以上;定量限最低可达0.001μg/L;日间相对标准偏差和日内相对标准偏差分别不超过5.33%和6.39%;加标回收率为(84.27±3.02)%~(114.25±1.77)%。定量结果表明,不同品种与不同部位的柠檬样品中生物活性物质的含量存在较大差异。26种物质在6种柠檬果实中的含量排序为:柯尔提粗柠檬>里斯本柠檬>尤力克柠檬>美国粗柠檬>扁红柠檬>北京柠檬;果皮中的含量显著高于果肉和果汁,所测类黄酮的总含量在26种生物活性成分中占比最高,是柠檬生物活性成分的主要来源之一,其中橙皮苷的含量居首位;柠檬油素、橙皮油内酯、伞形花内酯是柠檬果实中含量较高的香豆素类物质。该研究建立的同时测定26种生物活性成分含量的方法适用于柠檬果实不同部位多类型生物活性物质的筛查和定量分析,方法灵敏、可靠、具有通用性,可用于植物源性产品中多类型生物活性物质的分析研究。展开更多
基金Supported by Scientific Research Project of General Administration of Customs (2021DK16).
文摘[Objectives]The paper was to establish a rapid screening method of pesticide residues in strawberry based on HPLC-QTOF/MS SWATH acquisition mode.[Methods]The strawberry sample was extracted with acetonitrile,purified with anhydrous magnesium sulfate,sodium chloride and primary secondary amine(PSA)powder,and then loaded on the machine.The full information spectrum was collected by positive ion mode and screened by comparing with the spectrum library,and 20 kinds of pesticide residues were quantitatively analyzed.[Results]The detection limits of 20 pesticide residues were 0.0002-0.0100 mg/kg,and they showed good linearity in the range of 0.0005-0.1000μg/mL(R 2≥0.995).The recoveries ranged from 62.8%to 106.3%.[Conclusions]This method is rapid,simple,sensitive and non-targeted,and can be used for rapid screening of multiple pesticide residues in strawberry.
文摘利用超高效液相色谱-四极杆-飞行时间高分辨质谱(ultra performance liquid chromatography-quadrupole-time of flight high resolution mass spectrometry,UPLC-Q-TOF-HRMS)技术结合所有理论碎片离子的连续窗口采集(sequential window acquisition of all theoretical fragment ions,SWATH)模式,采用特征二级碎片离子峰面积进行外标法定量,建立了一种快速、灵敏同时测定柠檬中13种类黄酮、8种香豆素和呋喃香豆素、2种类柠檬苦素和3种酚酸物质的方法,并对6个品种柠檬果实的果皮、果肉和果汁中这26种生物活性成分进行了定量分析。方法学考察结果显示,该方法具有良好的线性关系、灵敏度、精密度和准确度:线性方程的相关系数均在0.99以上;定量限最低可达0.001μg/L;日间相对标准偏差和日内相对标准偏差分别不超过5.33%和6.39%;加标回收率为(84.27±3.02)%~(114.25±1.77)%。定量结果表明,不同品种与不同部位的柠檬样品中生物活性物质的含量存在较大差异。26种物质在6种柠檬果实中的含量排序为:柯尔提粗柠檬>里斯本柠檬>尤力克柠檬>美国粗柠檬>扁红柠檬>北京柠檬;果皮中的含量显著高于果肉和果汁,所测类黄酮的总含量在26种生物活性成分中占比最高,是柠檬生物活性成分的主要来源之一,其中橙皮苷的含量居首位;柠檬油素、橙皮油内酯、伞形花内酯是柠檬果实中含量较高的香豆素类物质。该研究建立的同时测定26种生物活性成分含量的方法适用于柠檬果实不同部位多类型生物活性物质的筛查和定量分析,方法灵敏、可靠、具有通用性,可用于植物源性产品中多类型生物活性物质的分析研究。
