physics chemistry nuclear



Food coloring (color additive)



Description: Interactive simulation to learn that it's possible to separate several colouring agents with the aim of analyzing the composition of a chemical species mixture.

Where we talk about the technique of separation and identification of a homogeneous mixture. The eluent here is salt water, but it is also said that a mixture of two and sometimes three different eluents may prove to be appropriate. Definition of the frontal ratio. Fixed phase, mobile phase ... The polarity of the various "protagonists" tends rather in the direction of facilitated migration.



Chromatography: Chromatography is a method used to separate the different substances present in a mixture. The sample containing one or more species is entrained by a current of mobile phase (liquid) in contact with a stationary phase (sheet). Each species migrates at a speed which depends on its characteristics and those of the two phases present.


flash animation