High resolution mass spectrometry in combination with distillation and SARA fractionation provides us an opportunity for in-depth understanding about the hydrotreating process at the molecular level. In this study, th...High resolution mass spectrometry in combination with distillation and SARA fractionation provides us an opportunity for in-depth understanding about the hydrotreating process at the molecular level. In this study, the atmospheric residue derived from Arabian heavy crude and its hydrotreated products were initially subjected to distillation and SARA fractionation. The saturates were characterized by GC FI/FD TOF MS. The aromatics and resins were characterized by APPI FT-ICR MS. Compositional changes of different compounds (paraffins, naphthenes, aromatic hydrocarbons, and heteroatomic compounds) contained in different distillates (vacuum gas oil, vacuum residue) were obtained. More detailed knowledge about the hydrotreating process was achieved.展开更多
复方汤剂成分复杂,需要寻找一个高分离度、高稳定性的分析方法进行定性分析。采用梯度萃取法,将麻黄汤水煎液中的化学组分分为脂溶性和水溶性成分进行定性分析。采用GC-MS技术分离麻黄汤乙酸乙酯提取部分化学成分,质谱使用EI离子源,通过...复方汤剂成分复杂,需要寻找一个高分离度、高稳定性的分析方法进行定性分析。采用梯度萃取法,将麻黄汤水煎液中的化学组分分为脂溶性和水溶性成分进行定性分析。采用GC-MS技术分离麻黄汤乙酸乙酯提取部分化学成分,质谱使用EI离子源,通过NIST MS Search 2.0标准质谱库定性分析,并结合相关文献资料,共鉴定出40个化学成分;采用UPLCQ-TOF-MS技术分离麻黄汤水提取部分化学成分,质谱使用ESI离子源,通过MZmine-2.9.1,Isotope Pattern软件以及质谱裂解规律定性分析,并对照对照品和结合相关文献资料,共鉴定出39个化学成分。该实验利用了GC-MS和UPLC-Q-TOF-MS对化学成分分析范围的差异,以及MS对未知化合物的准确鉴定优势,为麻黄汤药效物质的研究提供了依据,并为复方组分提供了一种简单快捷的分析鉴定方法。展开更多
建立了全二维气相色谱-飞行时间质谱(GC×GC-TOF MS)分析卷烟主流烟气中中性化学成分的方法。以较长的弱极性柱HP-5MS(50 m×0.2 mm i.d.×0.33μm)作为第一维柱,较短的薄液膜中等极性柱DB-17MS(1.7 m×0.1 mm i.d....建立了全二维气相色谱-飞行时间质谱(GC×GC-TOF MS)分析卷烟主流烟气中中性化学成分的方法。以较长的弱极性柱HP-5MS(50 m×0.2 mm i.d.×0.33μm)作为第一维柱,较短的薄液膜中等极性柱DB-17MS(1.7 m×0.1 mm i.d.×0.1μm)作为第二维柱,对优质烟叶单料卷烟烟气的中性成分进行定性分析,经过人工纠错等分析初步鉴定出匹配度大于700的1 464种成分,重点讨论了中性香味羰基化合物全二维点阵的谱图特征,为烟气和复杂体系的深入研究提供了方法学基础。展开更多
基金supported by the National Basic Research Program of China (2010CB226901)
文摘High resolution mass spectrometry in combination with distillation and SARA fractionation provides us an opportunity for in-depth understanding about the hydrotreating process at the molecular level. In this study, the atmospheric residue derived from Arabian heavy crude and its hydrotreated products were initially subjected to distillation and SARA fractionation. The saturates were characterized by GC FI/FD TOF MS. The aromatics and resins were characterized by APPI FT-ICR MS. Compositional changes of different compounds (paraffins, naphthenes, aromatic hydrocarbons, and heteroatomic compounds) contained in different distillates (vacuum gas oil, vacuum residue) were obtained. More detailed knowledge about the hydrotreating process was achieved.
文摘复方汤剂成分复杂,需要寻找一个高分离度、高稳定性的分析方法进行定性分析。采用梯度萃取法,将麻黄汤水煎液中的化学组分分为脂溶性和水溶性成分进行定性分析。采用GC-MS技术分离麻黄汤乙酸乙酯提取部分化学成分,质谱使用EI离子源,通过NIST MS Search 2.0标准质谱库定性分析,并结合相关文献资料,共鉴定出40个化学成分;采用UPLCQ-TOF-MS技术分离麻黄汤水提取部分化学成分,质谱使用ESI离子源,通过MZmine-2.9.1,Isotope Pattern软件以及质谱裂解规律定性分析,并对照对照品和结合相关文献资料,共鉴定出39个化学成分。该实验利用了GC-MS和UPLC-Q-TOF-MS对化学成分分析范围的差异,以及MS对未知化合物的准确鉴定优势,为麻黄汤药效物质的研究提供了依据,并为复方组分提供了一种简单快捷的分析鉴定方法。
文摘建立了全二维气相色谱-飞行时间质谱(GC×GC-TOF MS)分析卷烟主流烟气中中性化学成分的方法。以较长的弱极性柱HP-5MS(50 m×0.2 mm i.d.×0.33μm)作为第一维柱,较短的薄液膜中等极性柱DB-17MS(1.7 m×0.1 mm i.d.×0.1μm)作为第二维柱,对优质烟叶单料卷烟烟气的中性成分进行定性分析,经过人工纠错等分析初步鉴定出匹配度大于700的1 464种成分,重点讨论了中性香味羰基化合物全二维点阵的谱图特征,为烟气和复杂体系的深入研究提供了方法学基础。
