| abstract |
An internally smooth disposable column, of various sizes up to 800 ml. internal volume, made of biocompatible polymer is filled with particulate absorbent, e.g. carbon coated with polyHEMA, between support means located as close as practicable to inlet and outlet. L/D ratio is usually 1.5:1-5:1. Various shapes e.g. double frustoconical or trochoid of revolution are proposed for the column, which is preferably symmetrical to facilitate moulding of identical column halves; these shapes usually converge to meet a funnel-shaped connecting piece at inlet and outlet. |