This paper reported a new analytical method for the simultaneous determination of seven benzotriazole ultraviolet absorbers and seven antibacterial agents in textiles. After ultrasonic extraction for the textile sampl...This paper reported a new analytical method for the simultaneous determination of seven benzotriazole ultraviolet absorbers and seven antibacterial agents in textiles. After ultrasonic extraction for the textile samples in methanol, the solutions were analyzed by ultra-high performance liquid chromotagraphy/orbitrap high resolution mass spectrometry (UPLC/Orbitrap HRMS). It showed that a good chromatographic separation for these target compounds was achieved by a Hypersil GOLD column (100 mm × 2.1 mm × 1.9 μm) with a gradient elution of methanol and 0.1% aqueous formic acid solution (containing 0.5 mmol/L ammonium acetate). Triclosan and 4-chloro-3,5-dimethyl phenol (PCMX) were detected by the orbitrap HRMS in an electrospray ionization (ESI) negative mode while the other twelve target compounds were detected by orbitrap HRMS in ESI positive mode. Full scan experiment was performed over the range from m/z 100 to m/z 500. These target compounds were routinely detected with mass accuracy below 2 × 10-6 (2 ppm) at the optimized conditions. The results showed that the limits of detection (LODs) were in the range from 0.1 to 0.3 μg/kg. The blank samples were spiked at three levels and their average recoveries varied from 80.5% to 96.3% while the relative standard deviation (RSD) changed from 3.2% to 9.9%. The present method was also applied for the determination of those ultraviolet absorbers and antibacterial agents in the commercial textiles.展开更多
建立了超高效液相色谱-线性离子阱/静电场轨道阱组合式高分辨质谱(UHPLC-LTQ Orbitrap MS)联用技术整合多种数据采集、挖掘策略快速分析无患子果皮中苷类化合物;总结了两类无患子皂苷标准品的质谱裂解规律及特征碎片离子,用于无患子果...建立了超高效液相色谱-线性离子阱/静电场轨道阱组合式高分辨质谱(UHPLC-LTQ Orbitrap MS)联用技术整合多种数据采集、挖掘策略快速分析无患子果皮中苷类化合物;总结了两类无患子皂苷标准品的质谱裂解规律及特征碎片离子,用于无患子果皮中苷类成分的快速筛查和鉴别;探索了母离子列表(parent ion list,PIL)-MS2、PIL-MS3和高能碰撞(high energy collision dissociation,HCD)技术,用于无患子果皮中母核结构相近化合物的精细区分和鉴别;最后通过智能化的In silico策略(Mass Frontier软件中的FISH和MS Tree Match技术)对无患子果皮中新的苷类成分进行高通量筛查,并用HCD碎裂模式验证其预测的可靠性。结果表明,在无患子果皮中共鉴别出67个苷类化合物,其中38个化合物被快速筛查和鉴别,18个母核结构相近的化合物得以精细区分,11个新成分被推测。该方法能够为无患子质量控制及药效学研究提供参考数据,有助于复杂中药成分的快速定性分析。展开更多
文摘This paper reported a new analytical method for the simultaneous determination of seven benzotriazole ultraviolet absorbers and seven antibacterial agents in textiles. After ultrasonic extraction for the textile samples in methanol, the solutions were analyzed by ultra-high performance liquid chromotagraphy/orbitrap high resolution mass spectrometry (UPLC/Orbitrap HRMS). It showed that a good chromatographic separation for these target compounds was achieved by a Hypersil GOLD column (100 mm × 2.1 mm × 1.9 μm) with a gradient elution of methanol and 0.1% aqueous formic acid solution (containing 0.5 mmol/L ammonium acetate). Triclosan and 4-chloro-3,5-dimethyl phenol (PCMX) were detected by the orbitrap HRMS in an electrospray ionization (ESI) negative mode while the other twelve target compounds were detected by orbitrap HRMS in ESI positive mode. Full scan experiment was performed over the range from m/z 100 to m/z 500. These target compounds were routinely detected with mass accuracy below 2 × 10-6 (2 ppm) at the optimized conditions. The results showed that the limits of detection (LODs) were in the range from 0.1 to 0.3 μg/kg. The blank samples were spiked at three levels and their average recoveries varied from 80.5% to 96.3% while the relative standard deviation (RSD) changed from 3.2% to 9.9%. The present method was also applied for the determination of those ultraviolet absorbers and antibacterial agents in the commercial textiles.
文摘建立了超高效液相色谱-线性离子阱/静电场轨道阱组合式高分辨质谱(UHPLC-LTQ Orbitrap MS)联用技术整合多种数据采集、挖掘策略快速分析无患子果皮中苷类化合物;总结了两类无患子皂苷标准品的质谱裂解规律及特征碎片离子,用于无患子果皮中苷类成分的快速筛查和鉴别;探索了母离子列表(parent ion list,PIL)-MS2、PIL-MS3和高能碰撞(high energy collision dissociation,HCD)技术,用于无患子果皮中母核结构相近化合物的精细区分和鉴别;最后通过智能化的In silico策略(Mass Frontier软件中的FISH和MS Tree Match技术)对无患子果皮中新的苷类成分进行高通量筛查,并用HCD碎裂模式验证其预测的可靠性。结果表明,在无患子果皮中共鉴别出67个苷类化合物,其中38个化合物被快速筛查和鉴别,18个母核结构相近的化合物得以精细区分,11个新成分被推测。该方法能够为无患子质量控制及药效学研究提供参考数据,有助于复杂中药成分的快速定性分析。
文摘采用超高效液相色谱-四极杆/静电场轨道阱高分辨质谱(ultra-high performance liquid chromatography-quadrupole/exactive Orbitrap mass spectrometry,UPLC-Q-Exactive Orbitrap MS)和质量亏损过滤技术(mass defect filter,MDF)对三叶青黄酮类化合物进行定性分析。通过查阅文献,确定三叶青黄酮类物质母核作为MDF模板,根据取代基的数目和种类确定MDF的质量范围、质量亏损范围,采用UPLC-Q-Exactive Orbitrap MS采集—MDF-Orbitrap Traditional Chinese Medicine Library(OTCML)数据库检索—Mass Frontier验证的鉴定策略,对三叶青乙醇冷浸液所含的黄酮类物质进行定性分析,共鉴定出41种黄酮类化合物,其中19个为首次发现。该方法对于准确识别三叶青黄酮类化合物,进而科学评价三叶青质量、促进三叶青合理开发具有一定的指导意义。
