A series of Al-Ti-B master alloys were prepared by different preparation routes,and the TiB2 particles in the master alloys were extracted and analyzed.It is found that the forming process has significant influence on...A series of Al-Ti-B master alloys were prepared by different preparation routes,and the TiB2 particles in the master alloys were extracted and analyzed.It is found that the forming process has significant influence on the three-dimensional morphology of TiB2 particles.Different preparation routes result in different reaction forms,which accounts for the morphology variation of TiB2 particles.When the Al-Ti-B master alloy is prepared using ＂halide salt＂ route,TiB2 particles exhibit hexagonal platelet morphology and are independent with each other.In addition,the reaction temperature almost does not have influence on the morphology of TiB2 particles.However,TiB2 particles exhibit different morphologies at different reaction temperatures when the master alloys are prepared with Al-3B and Ti sponge.When the master alloy is prepared at 850 ℃,a kind of TiB2 particle agglomeration forms with a size larger than 5 μm.The TiB2 particles change to layered stacking morphology even dendritic morphology with the reaction temperature reaching up to 1200 ℃.展开更多
目的建立LC-MS/MS法同时测定大鼠组织中替格瑞洛及其代谢物AR-C124910XX质量浓度的方法,并应用于替格瑞洛及其代谢物组织分布的研究。方法组织样品采用乙醚提取,Agilent XDB-C_(18)柱分离;流动相为甲醇-乙腈-体积分数0.1%甲酸水溶液(体...目的建立LC-MS/MS法同时测定大鼠组织中替格瑞洛及其代谢物AR-C124910XX质量浓度的方法,并应用于替格瑞洛及其代谢物组织分布的研究。方法组织样品采用乙醚提取,Agilent XDB-C_(18)柱分离;流动相为甲醇-乙腈-体积分数0.1%甲酸水溶液(体积比50∶20∶30),流速为0.7 m L·min^(-1);质谱采用MRM多反应检测模式,正离子方式检测。结果替格瑞洛在0.1~50μg·g^(-1)内线性关系良好,日间、日内精密度RSD均不大于12.7%;AR-C124910XX在0.05~20μg·g^(-1)内呈良好线性关系,日间、日内精密度RSD均不大于10.7%。结论该法适合于测定大鼠组织中替格瑞洛及其代谢物的质量浓度,并为替格瑞洛的进一步临床研究奠定基础。展开更多
基金the National Natural Science Foundation of China (Nos. 52071179, 5227010325)the Natural Science Foundation of Jiangsu Province, China (No. BK20221493)the Fundamental Research Funds for the Central Universities, China (Nos. 30920021160, 30919011405)。
基金supported by the Key P rogram of National Natural Science Foundation of China(No.51931003)the National Natural Science Foundation of China(Nos.52271033,52071179)+1 种基金the Natural Science Foundation of Jiangsu Province,China(No.BK20221493)the Foundation of Qinglan Project for Colleges and Universities in Jiangsu Province,China.
基金Project(50625101) supported by the National Science Fund for Distinguished Young Scholars of ChinaProject supported by Graduate Independent Innovation Foundation of Shandong University(GIIFSDU),ChinaProject(51071097) supported by the National Natural Science Foundation of China
文摘A series of Al-Ti-B master alloys were prepared by different preparation routes,and the TiB2 particles in the master alloys were extracted and analyzed.It is found that the forming process has significant influence on the three-dimensional morphology of TiB2 particles.Different preparation routes result in different reaction forms,which accounts for the morphology variation of TiB2 particles.When the Al-Ti-B master alloy is prepared using ＂halide salt＂ route,TiB2 particles exhibit hexagonal platelet morphology and are independent with each other.In addition,the reaction temperature almost does not have influence on the morphology of TiB2 particles.However,TiB2 particles exhibit different morphologies at different reaction temperatures when the master alloys are prepared with Al-3B and Ti sponge.When the master alloy is prepared at 850 ℃,a kind of TiB2 particle agglomeration forms with a size larger than 5 μm.The TiB2 particles change to layered stacking morphology even dendritic morphology with the reaction temperature reaching up to 1200 ℃.
文摘目的建立LC-MS/MS法同时测定大鼠组织中替格瑞洛及其代谢物AR-C124910XX质量浓度的方法,并应用于替格瑞洛及其代谢物组织分布的研究。方法组织样品采用乙醚提取,Agilent XDB-C_(18)柱分离;流动相为甲醇-乙腈-体积分数0.1%甲酸水溶液(体积比50∶20∶30),流速为0.7 m L·min^(-1);质谱采用MRM多反应检测模式,正离子方式检测。结果替格瑞洛在0.1~50μg·g^(-1)内线性关系良好,日间、日内精密度RSD均不大于12.7%;AR-C124910XX在0.05~20μg·g^(-1)内呈良好线性关系,日间、日内精密度RSD均不大于10.7%。结论该法适合于测定大鼠组织中替格瑞洛及其代谢物的质量浓度,并为替格瑞洛的进一步临床研究奠定基础。
