制药行业在线TOC分析仪的校准

根据JJG (浙) 98-2007《电导率法总有机碳分析仪检定规程》,对制药行业在线TOC分析仪和配制的满量程20%、50%、80%的蔗糖标准溶液进行校准,并计算校准结果的示值误差和重复性,对示值误差测得值进行不确定度的评定,扩展不确定为1.3%(k=2)。实验证明：该校准方法可用于制药行业在线TOC分析仪的量值溯源。     

2-硝基-4，5-二氰基-1H-咪唑的一锅法合成（英）

In the last few decades,nitroimidazoles have been investigated mostly due to their properties as antibiotics,radiosensitizers and anti-protozoans[1 -3].Recently these nitroimidazoles,such as 2,4-dinitroimidazole,1-methyl-2,4,5-trinitroimidazole and their energetic salts, have attracted renewed attention for their favorable explosive performance as well as improved safety characteristics[4,5].Because of the activity of cyano group,2-nitro-4,5-dicyano-1 H-imidazole (NDCI) could be used as an intermediate in the synthesis of novel energetic materials containing nitroimidazole moiety.NDCI has been synthesized by the procedure given by Yixin Lu and coworkers[6],where the diazotization reaction and the Sandmeyer reaction were separately achieved.NDCI was obtained by adding a solution of sodium nitrite to 2-diazo4,5-dicyanoimidazole which was generated by diazotization of 2-amino-4,5-dicyano-1H-imidazole ( ADCI ) with sodium nitrite in water-hydrochloric acid and collected by filtration.Dry 2-diazo-4,5-dicyanoimidazole was so sensitive to shock that its separation may cause explosion[7].     

FOX-7合成过程中水解反应的热危险性及反应动力学

利用反应量热仪(RC1),测定了以2?(二硝基亚甲基)?5,5?二硝基?2H?嘧啶?4,6?二酮(TNMPO)为原料,经水解反应制备FOX?7工艺的热流曲线,对水解反应的工艺热危险性进行了分析,采用定温实验,利用n级反应动力学方程对不同温度下的水解反应速率进行了拟合,进而获得了水解反应的表观反应动力学参数.结果显示,2...