A New Slurrypacking Technique for Columns in

In this work a new packing principle was investigated, which involves a combination of stirring action to keep the particles floating and high initial pressure action to transport the particles rapidly from the mixing vessel via high pressure tubing into the column. This packing technique can provide good columns at lengths<20 cm. Shorter columns could be coupled easily to increase the plate number but for most practical applications the separation efficiency is satis-factory. The column quality is comparable to columns packed by the equal density method but the technique has several advantages, such as shorter packing time (3 columns in 15 minutes compared to about 4 hours with the former technique); absence of toxic halogenated solvents and tedious adjustment of adsorbents. The technique is flexible and has been used for 5/A, 7/j., and 10/j.silicagels of two manu