Danshen, the dried root of Salvia miltiorrhiza Bunge（Lamiaceae）, is one of the traditional Chinese medicines（TCMs） most commonly used for the treatment of cardiovascular and cerebrovascular diseases. However, litt...Danshen, the dried root of Salvia miltiorrhiza Bunge（Lamiaceae）, is one of the traditional Chinese medicines（TCMs） most commonly used for the treatment of cardiovascular and cerebrovascular diseases. However, little is known about the chemical and metabolic profiles of danshen in vitro or in vivo. In particular, more information is needed in relation to the 50% ethanol extracts usually used in danshen formulations such as Fufang Xueshuantong Capsules and Fufang Danshen tablets. High-performance liquid chromatography coupled with a linear ion trapOrbitrap mass spectrometer（HPLC-LTQ-Orbitrap） provides a sensitive and accurate method for analyzing the composition of samples. This method was used to determine the in vitro and in vivo chemical and metabolic profiles of danshen. Sixty-nine components of danshen extract and 118 components of danshen in rat plasma, urine, feces, and bile were unambiguously or tentatively identified. These results not only revealed the material composition of danshen, but also provided a comprehensive research approach for the identification of multi-constituents in TCMs.展开更多
建立了基于高效液相色谱-线性离子阱/静电场轨道阱高分辨质谱（HPLC-LTQ/Orbitrap MS）快速筛查确证生态纺织品中22种禁用分散染料的分析方法。样品在95℃水浴条件下经吡啶/水（1∶1,v/v）振荡提取后,以CAPCELL PAK C18色谱柱分离,以乙...建立了基于高效液相色谱-线性离子阱/静电场轨道阱高分辨质谱（HPLC-LTQ/Orbitrap MS）快速筛查确证生态纺织品中22种禁用分散染料的分析方法。样品在95℃水浴条件下经吡啶/水（1∶1,v/v）振荡提取后,以CAPCELL PAK C18色谱柱分离,以乙腈和5 mmol/L乙酸铵（含体积分数为0.01%的甲酸）作为色谱流动相进行梯度洗脱,采用正、负电喷雾（ESI）离子化模式,利用一级母离子的精确质量数和保留时间对22种分散染料进行快速筛查,利用碰撞诱导解离（CID）下得到的二级碎片离子进行确证。22种分散染料在各自浓度范围内线性关系良好（r2〉0.99）,方法的定量限（LOQ）为0.125~2.5 mg/kg。除分散黄49外,绝大多数染料在涤纶布、棉涤混纺布两种纺织品基质中的加标回收率在65%~120%之间,相对标准偏差小于15%。应用本方法对涉及多种纤维类型的40余件纺织品样品进行了筛查,其中一个样品检出分散橙37/76。该方法简便、快速,其选择性高,抗干扰性能好,结果准确可靠,可用于纺织品中分散染料的检测。展开更多
基金Project supported by the Ministry of Science and Technology of China(No.2011ZX09201-201-22)
文摘Danshen, the dried root of Salvia miltiorrhiza Bunge（Lamiaceae）, is one of the traditional Chinese medicines（TCMs） most commonly used for the treatment of cardiovascular and cerebrovascular diseases. However, little is known about the chemical and metabolic profiles of danshen in vitro or in vivo. In particular, more information is needed in relation to the 50% ethanol extracts usually used in danshen formulations such as Fufang Xueshuantong Capsules and Fufang Danshen tablets. High-performance liquid chromatography coupled with a linear ion trapOrbitrap mass spectrometer（HPLC-LTQ-Orbitrap） provides a sensitive and accurate method for analyzing the composition of samples. This method was used to determine the in vitro and in vivo chemical and metabolic profiles of danshen. Sixty-nine components of danshen extract and 118 components of danshen in rat plasma, urine, feces, and bile were unambiguously or tentatively identified. These results not only revealed the material composition of danshen, but also provided a comprehensive research approach for the identification of multi-constituents in TCMs.
文摘建立了高效液相色谱-线性离子阱／静电场轨道阱高分辨质谱（HPLC-LTQ／Orbitrap MS）筛查和确证生态纺织品中致癌染料的方法.样品在水浴（95℃）中用吡啶／水（1／1，v／v）振荡（150r／min）提取．上清液过聚四氟乙烯（PTFE）滤膜后，CAPCELL PAK C18色谱柱（100mm×2．0mm，5μm）分离，以乙腈和5mmol／L乙酸铵水溶液（含0．01％甲酸）、乙腈和5mmol／L乙酸铵水溶液分别作为正、负电喷雾离子化（ESI）模式的色谱流动相梯度洗脱。m／z200～800范围内进行一级质谱全扫描。以准分子离子峰的精确质量数和提取的色谱图峰面积进行筛查分析和定量．以保留时间和数据依赖扫描（data—dependent scan）模式获得的子离子质谱图进行定性确证。9种染料的质量准确度小于5×10^-6（5ppm），线性良好，相关系数大于0．99，方法检出限为0．125～25mg／kg。3个添加水平的回收率范围为62．13％～116．28％，相对标准偏差小于15％.应用该方法检测了棉、涤纶及混纺纤维等20余件纺织品样品中的致癌染料残留。该方法准确、可靠．
