Data for packed and plate columns

It is practically impossible to obtain reliable comparative values for the HETP s of packed columns and for the plate efficiencies (or average enrichment ratios) of ])late colunms from data published in the literature, since these data refer to various test mixtures and were obtained under different conditions. Only in rare cases are all the necessary data, mentioned in section 4.10, given. Some agreement on a standardized 

However, with the object of providing a rough idea, the present data for the most important types of packed and plate columns [215] have been collected in Table 31. The various forms of packing and plate columns will be described further in sections 7.8 and 7.3.3. 

---