Plate height scope

An extended discussion of zone spreading and plate height in nonuniform separation systems is beyond the scope of the present chapter. However, later we account for flow nonuniformities due to gas compressibility in gas chromatography. More generally, the treatment developed by the author [8,16] for chromatographic columns can be expanded to describe most other zonal systems. 

The use of the concept of the reduced plate height, h, which is the quantity H divided by dp and the reduced velocity, V, given by V = udp/Dm is of practical advantage in the comparison of the efficiency of columns packed with particles of different diameters and in theoretical treatments. However, the discussion of the reduced plate height is out of the scope of this book and one who is interested in this problem should consult other related books [e.g., ref. 9]. 

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