In this papr, the determination of flourine in CeO 2 with the Low Pressure Ion Chromatography has been discussed. AgClO 4 has been added to HClO 4 dielectric in order to avoid anion such as Cl - which may affect the d...In this papr, the determination of flourine in CeO 2 with the Low Pressure Ion Chromatography has been discussed. AgClO 4 has been added to HClO 4 dielectric in order to avoid anion such as Cl - which may affect the determination of fluorine. Fluorine has been absorbed in KOH solution after steam distillation. The optimum condition is 1.2mmol/L of Na 2CO 3 in eluting. It shows that the analytical result by LPIC is as satisfactory as that by (Ac-La) 2F 2 spectrophotometric mthods.展开更多
文摘In this papr, the determination of flourine in CeO 2 with the Low Pressure Ion Chromatography has been discussed. AgClO 4 has been added to HClO 4 dielectric in order to avoid anion such as Cl - which may affect the determination of fluorine. Fluorine has been absorbed in KOH solution after steam distillation. The optimum condition is 1.2mmol/L of Na 2CO 3 in eluting. It shows that the analytical result by LPIC is as satisfactory as that by (Ac-La) 2F 2 spectrophotometric mthods.
文摘化工传质过程需应用多种类型的设备,其中广泛应用的是塔式设备(主要有填料塔和板式塔),塔设备的构造、操作原理及其水力学性能,仅用传统教学手段难以表达清楚。3DS MAX提供了将这些抽象概念在三维空间加以形象描述和模拟的有力工具。本文利用3DS MAX R3动画制作技术(三维建模、材质和环境设置、粒子系统、动画制作等)制作模拟了化工传质塔设备的构造、操作过程及其水力学性能的状况。学生可以用此课件从不同角度观察塔的内部构造、运行情况以及载液、液泛等水力学性能的表现。用3DS MAX制作化工教学的MCAI课件,使这一应用性的学科更加形象和具体,学生更易理解和掌握。