1)Chromatography is a useful method for separating the substances in certain mixtures. There are many physical processes which may be used to separate mixtures, but chromatography will not be as obvious to students as others such as filtering, evaporation, or using a magnet. Because the substances which make up certain mixtures dissolve at different rates, these substances can be separated by chromatography.
2)The biggest advantage of column chromatography is that it can usually be scaled to the project at hand. This is especially useful if one is trying to separate and purify a reaction mixture preparing an intermediate in a sequence of reactions. The corresponding disadvantage is the column may take a long time to properly prepare and use.
Thin layer chromatography is usually great for initial analysis and determining the conditions needed for a good separation. Many plates are commercially available and the chromatograms usually do not take a long time to develop. The main disadvantage is the very small amounts of compounds handled. These can be recovered for instrumental analysis, but seldom is there enough for further reaction.
3) This are the types of chromatography.
Labels: NABIL 3N1