全国通用中学化学课本新增添“纸上层析”的演示实验是一个很有意义的实验,而选择分离无色的酚酞和有色的甲基橙混和物试样,既能在展开过程中可以直接观察到有色组分的情况,又能通过显色方法才能看到无色酚酞的移动结果,这样,就使学生比较直观和全面地了解“纸上层析”的过程和基本方法。 National General High School chemistry textbook new “paper chromatography” demonstration experiment is a very meaningful experiment, and choose to separate colorless phenolphthalein and colored methyl orange mixture samples, both in the process of unfolding can be direct Observed the colored components of the situation, but also through the color method to see the results of the movement of colorless phenolphthalein, thus allowing students to more intuitive and comprehensive understanding of the “paper chromatography” process and basic methods.