The CI-TOFMS of ketoprofen (KP), β-cyclodextrin (CD) and their inclusion complex (KP-CD) have been reported. There are no [M+H]^+ peaks of both KP-CD and CD in their spectra due to the samples involatile and thermal ...The CI-TOFMS of ketoprofen (KP), β-cyclodextrin (CD) and their inclusion complex (KP-CD) have been reported. There are no [M+H]^+ peaks of both KP-CD and CD in their spectra due to the samples involatile and thermal instable. A base peak at m/z 255 in the spectra of both KP and KP-CD was found, which can be assigned to [M+H]^+of KP or inclusive KP (KPi). Three fragment ions a, b and c were formed in the spectra of both KP and KPi with different abundances for the same ions. All the fragment ions of CD and inclusive CD (CDi) have been assigned.展开更多
建立了采用全二维气相色谱-飞行时间质谱(GC×GC-TO FM S)分析烟草的中性化学成分的方法。以DB-Petro(50m×200μm×0.5μm)为第一维色谱柱,DB-1701(2.3m×100μm×0.1μm)为第二维色谱柱;调制周期为8s;柱头压力为5...建立了采用全二维气相色谱-飞行时间质谱(GC×GC-TO FM S)分析烟草的中性化学成分的方法。以DB-Petro(50m×200μm×0.5μm)为第一维色谱柱,DB-1701(2.3m×100μm×0.1μm)为第二维色谱柱;调制周期为8s;柱头压力为550kPa;采用程序升温方式,初始温度分别为80℃和85℃。采用所建立的方法对不同部位的烟叶、不同品种烟草中的25种中性香味成分含量进行了测定和对比。结果表明:云南楚雄产云烟85的中性香味成分(不包括新植二烯)的总量以中部叶最高,其次是上部叶,下部叶最少;国内外不同品种的烤烟中中性香味成分的含量高低顺序为:巴西烤烟最高,其次是津巴布韦烤烟、云烟85、中烟101、NC89、K326;4类烟草中中性香味成分含量最高的是香料烟,其次是白肋烟、烤烟、马里兰烟。展开更多
文摘The CI-TOFMS of ketoprofen (KP), β-cyclodextrin (CD) and their inclusion complex (KP-CD) have been reported. There are no [M+H]^+ peaks of both KP-CD and CD in their spectra due to the samples involatile and thermal instable. A base peak at m/z 255 in the spectra of both KP and KP-CD was found, which can be assigned to [M+H]^+of KP or inclusive KP (KPi). Three fragment ions a, b and c were formed in the spectra of both KP and KPi with different abundances for the same ions. All the fragment ions of CD and inclusive CD (CDi) have been assigned.
文摘建立了采用全二维气相色谱-飞行时间质谱(GC×GC-TO FM S)分析烟草的中性化学成分的方法。以DB-Petro(50m×200μm×0.5μm)为第一维色谱柱,DB-1701(2.3m×100μm×0.1μm)为第二维色谱柱;调制周期为8s;柱头压力为550kPa;采用程序升温方式,初始温度分别为80℃和85℃。采用所建立的方法对不同部位的烟叶、不同品种烟草中的25种中性香味成分含量进行了测定和对比。结果表明:云南楚雄产云烟85的中性香味成分(不包括新植二烯)的总量以中部叶最高,其次是上部叶,下部叶最少;国内外不同品种的烤烟中中性香味成分的含量高低顺序为:巴西烤烟最高,其次是津巴布韦烤烟、云烟85、中烟101、NC89、K326;4类烟草中中性香味成分含量最高的是香料烟,其次是白肋烟、烤烟、马里兰烟。
