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为了适应国家实现四个现代化的要求,使教材能尽快赶上先进国家的水平,统编教材《初中化学》(人民教育出版社,1978年)中增加了《纸上层析》的演示实验,并写了原理说明,还在扉页上安排了彩色的插图。这对引起学生的学习兴趣,使他们初步们获得物质层析分离的知识和技能,为以后掌握色谱分析实验手段,并应用在许多科学领域准备了条件。安排这个实验是有深刻意义的。我们在教学实践中,感到如果将这一演示实验的操作方法略加改进,效果会更好。特提出以下改进意见和大家商榷。正像扉页插图中显示的,这一实验有分离的可能和倾向,但不足的是没有真正分离开。如果稍加改进,会更好。
In order to meet the requirements of the country for the realization of the four modernizations, the teaching materials can catch up with the advanced countries as soon as possible, and in the textbook “Junior High School Chemistry” (People’s Education Press, 1978), the “paper chromatography” demonstration experiment was added. And wrote a description of the principle, and also arranged a colorful illustration on the title page. This has aroused students’ interest in learning, so that they initially obtained the knowledge and skills of material chromatography separation, and later used it to master chromatographic analysis experimental methods and applied conditions in many scientific fields. Arranging this experiment is of profound significance. In teaching practice, we feel that if we slightly improve the operation method of this demonstration experiment, the effect will be better. Specially proposed the following improvement suggestions and discussion. As shown on the title page, this experiment has the possibility and tendency to separate, but the shortcoming is not really separated. If you improve it slightly, it will be better.