Analytical Chemistry

Figure 4.5

Extraction scheme for a single solute by Craig counter-current distribution.

(Figures represent the proportions in each phase for D = 1 and equal

volumes. Only the first four extractions are shown).

Table 4.6 Proportional distribution of a solute between extraction units for Craig
counter-current distribution

Extraction

Unit number

1 2 3 4 5 6 7

1st (^1)
2nd (^11)
3rd (^121)
4th (^1331)
5th (^14641)
6th (^15101051)
7th 1 6 15 20 15 6 1