目的建立测定乳汁中拉莫三嗪浓度的高效液相色谱方法。方法以氯唑沙宗为内标,乳汁样品用乙醚萃取,用C18柱分析。流动相为乙腈-0.05mol·L-1磷酸二氢钠水溶液(26.5∶73.5,p H 4.5),流速为1.0 m L·min-1;检测波长为220 nm,柱温...目的建立测定乳汁中拉莫三嗪浓度的高效液相色谱方法。方法以氯唑沙宗为内标,乳汁样品用乙醚萃取,用C18柱分析。流动相为乙腈-0.05mol·L-1磷酸二氢钠水溶液(26.5∶73.5,p H 4.5),流速为1.0 m L·min-1;检测波长为220 nm,柱温为25℃。结果拉莫三嗪在0.02~10.00μg·m L-1内线性关系良好(r=0.999 5),定量下限为0.02μg·m L-1。高、中、低质控样品提取回收率分别为71.45%,70.26%,72.63%,日内、日间RSD均〈15%。1例癫痫产妇拉莫三嗪的乳药浓度为(0.96±0.11)μg·m L-1,乳药/血药浓度比为(0.64±0.04)。结论该方法操作简便、准确、灵敏度高,可用于拉莫三嗪的乳药浓度检测。展开更多
8,2'-Diprenylquercetin 3-methyl ether with significant anti-breast cancer activity is the main constituent of Tibetan medicine Sinopodophylli Fructus. In the present study, we developed and validated a rapid and sens...8,2'-Diprenylquercetin 3-methyl ether with significant anti-breast cancer activity is the main constituent of Tibetan medicine Sinopodophylli Fructus. In the present study, we developed and validated a rapid and sensitive ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method for the determination of 8,2'-diprenylquercetin 3-methyl ether in rat plasma. 8-Prenylkaempferol was used as the internal standard. The separation was carried out using Waters ACQUITY UPLC BEH C18 column (2.1 mm×100 ram, 1.7 μm) with a mobile phase consisting of acetonitrile and 0.1% formic acid in water on a gradient program at a flow rate of 0.4 mL'min-1 and temperature of 30 ℃. Triple quadrupole mass spectrometric detection in negative ion mode was used for multiple-reaction monitoring of the transitions at m/z 451.30→177.25 and m/z 353.25→298.15 for 8,2'-diprenylquercetin 3-methyl ether and 8-prenylkaempferol, respectively. The calibration curves were linear within the concentration range 0.1-2000 ng/mL (r = 0.9954). The recoveries were 103%-115%, and the results were consistent across low, middle and high concentration levels. The intra- and inter-day precisions were within 15%, and the bias was between --6%-15%. This method was simple, rapid and sensitive, which could be applied to the determination of 8,2'-diprenylquercetin 3-methyl ether in plasma and pharmacokinetic study in rats. Pharmacokinetic test indicated that the peak plasma concentration occurred in 2 h after the female rats were intragastrically administered with 8,2'-diprenylquercetin 3-methyl ether at the dose of 100 mg/kg, and the biological half-life was 6.79 h. The blood drug concentration maintained equal amount for 20 h, which was conducive to the in vivo effects of drugs.展开更多
文摘目的建立测定乳汁中拉莫三嗪浓度的高效液相色谱方法。方法以氯唑沙宗为内标,乳汁样品用乙醚萃取,用C18柱分析。流动相为乙腈-0.05mol·L-1磷酸二氢钠水溶液(26.5∶73.5,p H 4.5),流速为1.0 m L·min-1;检测波长为220 nm,柱温为25℃。结果拉莫三嗪在0.02~10.00μg·m L-1内线性关系良好(r=0.999 5),定量下限为0.02μg·m L-1。高、中、低质控样品提取回收率分别为71.45%,70.26%,72.63%,日内、日间RSD均〈15%。1例癫痫产妇拉莫三嗪的乳药浓度为(0.96±0.11)μg·m L-1,乳药/血药浓度比为(0.64±0.04)。结论该方法操作简便、准确、灵敏度高,可用于拉莫三嗪的乳药浓度检测。
基金National Natural Science Foundation of China(Grant No.81673590)National Key Technology R&D Program "New Drug Innovation" of China(Grant No.2013ZX09103002-006)
文摘8,2'-Diprenylquercetin 3-methyl ether with significant anti-breast cancer activity is the main constituent of Tibetan medicine Sinopodophylli Fructus. In the present study, we developed and validated a rapid and sensitive ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method for the determination of 8,2'-diprenylquercetin 3-methyl ether in rat plasma. 8-Prenylkaempferol was used as the internal standard. The separation was carried out using Waters ACQUITY UPLC BEH C18 column (2.1 mm×100 ram, 1.7 μm) with a mobile phase consisting of acetonitrile and 0.1% formic acid in water on a gradient program at a flow rate of 0.4 mL'min-1 and temperature of 30 ℃. Triple quadrupole mass spectrometric detection in negative ion mode was used for multiple-reaction monitoring of the transitions at m/z 451.30→177.25 and m/z 353.25→298.15 for 8,2'-diprenylquercetin 3-methyl ether and 8-prenylkaempferol, respectively. The calibration curves were linear within the concentration range 0.1-2000 ng/mL (r = 0.9954). The recoveries were 103%-115%, and the results were consistent across low, middle and high concentration levels. The intra- and inter-day precisions were within 15%, and the bias was between --6%-15%. This method was simple, rapid and sensitive, which could be applied to the determination of 8,2'-diprenylquercetin 3-methyl ether in plasma and pharmacokinetic study in rats. Pharmacokinetic test indicated that the peak plasma concentration occurred in 2 h after the female rats were intragastrically administered with 8,2'-diprenylquercetin 3-methyl ether at the dose of 100 mg/kg, and the biological half-life was 6.79 h. The blood drug concentration maintained equal amount for 20 h, which was conducive to the in vivo effects of drugs.