该研究按照《中国药典》(2015年版)要求测定样品醇溶性浸出物含量,同时建立GC-MS指纹图谱,使用《中药指纹图谱相似度评价(2012年版)》计算指纹图谱相似度,峰面积归一化法计算170~270 min与0~100 min 2区间总峰面积的比值,自动质谱退卷...该研究按照《中国药典》(2015年版)要求测定样品醇溶性浸出物含量,同时建立GC-MS指纹图谱,使用《中药指纹图谱相似度评价(2012年版)》计算指纹图谱相似度,峰面积归一化法计算170~270 min与0~100 min 2区间总峰面积的比值,自动质谱退卷积定性系统(AMDIS)结合保留指数(RI)鉴定共有组分和差异组分,OPLS-DA结合相关系数P(corr)和变量权重(VIP)筛选差异组分,灰色关联度和TOPSIS分析法综合评价人工沉香品质。结果显示18批人工沉香中15批浸出物含量符合要求,指纹图谱相似度在0.439~0.779,2区间总峰面积比值在0.307~13.254,共鉴定出9个共有组分和8个差异组分,综合上述20个指标进行灰色关联度和TOPSIS分析得到2%水杨酸诱导的人工沉香品质最优。建立的灰色关联度结合TOPSIS分析法可快速判断不同酸性诱导剂生产的人工沉香品质,为人工沉香的全面质量评价提供参考依据。展开更多
An experiment on effects of composite promoting agents composed of surfactants and liquid hydrocarbons on hydrate formation was conducted and the hydrate formation temperature,pressure,induction time and rate in the p...An experiment on effects of composite promoting agents composed of surfactants and liquid hydrocarbons on hydrate formation was conducted and the hydrate formation temperature,pressure,induction time and rate in the presence of different composite promoting agent packages were measured.The surfactants used covered sodium dodecyl sulfate(SDS),sodium dodecyl benzene sulfonate(SDBS) and 2-octyl sodium dodecyl sulfate(GC20S),and the liquid hydrocarbon additives utilized included cyclopentane(CP) and methyl cyclohexane(MCH).It appeared that all these combinations of composite promoting agents could promote hydrate formation.The type II hydrate formation conditions using composite promoting agents composed of CP and GC20S were the mildest and the induction time was the shortest;whereas the type H hydrates formation conditions using composite promoting agents composed of MCH and GC20S were the mildest and the induction time was also the shortest.展开更多
文摘该研究按照《中国药典》(2015年版)要求测定样品醇溶性浸出物含量,同时建立GC-MS指纹图谱,使用《中药指纹图谱相似度评价(2012年版)》计算指纹图谱相似度,峰面积归一化法计算170~270 min与0~100 min 2区间总峰面积的比值,自动质谱退卷积定性系统(AMDIS)结合保留指数(RI)鉴定共有组分和差异组分,OPLS-DA结合相关系数P(corr)和变量权重(VIP)筛选差异组分,灰色关联度和TOPSIS分析法综合评价人工沉香品质。结果显示18批人工沉香中15批浸出物含量符合要求,指纹图谱相似度在0.439~0.779,2区间总峰面积比值在0.307~13.254,共鉴定出9个共有组分和8个差异组分,综合上述20个指标进行灰色关联度和TOPSIS分析得到2%水杨酸诱导的人工沉香品质最优。建立的灰色关联度结合TOPSIS分析法可快速判断不同酸性诱导剂生产的人工沉香品质,为人工沉香的全面质量评价提供参考依据。
基金support from the National Natural Science Foundation of China (No.51176015)
文摘An experiment on effects of composite promoting agents composed of surfactants and liquid hydrocarbons on hydrate formation was conducted and the hydrate formation temperature,pressure,induction time and rate in the presence of different composite promoting agent packages were measured.The surfactants used covered sodium dodecyl sulfate(SDS),sodium dodecyl benzene sulfonate(SDBS) and 2-octyl sodium dodecyl sulfate(GC20S),and the liquid hydrocarbon additives utilized included cyclopentane(CP) and methyl cyclohexane(MCH).It appeared that all these combinations of composite promoting agents could promote hydrate formation.The type II hydrate formation conditions using composite promoting agents composed of CP and GC20S were the mildest and the induction time was the shortest;whereas the type H hydrates formation conditions using composite promoting agents composed of MCH and GC20S were the mildest and the induction time was also the shortest.
