ქიმიის ტერმინთა განმარტებითი ლექსიკონი

Apparatus for extraction based on a multistage countercurrent distribution.

Note: The Craig countercurrent distribution (CCD) apparatus consists of a battery of glass vessels
designed to allow mixing, settling and transfer of extracted phase (sample) and addition of fresh solvent
(extractant) in a repetitive fashion. Movement about the horizontal axis provides gentle mixing of the
phases, settling, and decanting of the upper phase, respectively. The extraction process is slow but is
fully automated.