Ichthyocoll coacervation

Fig. 40 reproduces turbidity measurements at pH 3.92 on 0.04% ichthyocoll sols. The left-hand figure relates to coacervation with K3Fe(CN)e as a function of the concentration of the salt. The coacervation already begins at concentrations lower than 1 m. eq. per 1 (log C = 0.00— 3), passes through a maximum at about 5 m. eq. per 1 (log. C = 0.70—3) to decrease again later considerably at greater concentrations. 

Fig. 39. Coacervation of positive Ichthyocoll sol with KaFeCCN). 48 X linear.

In the above given example of positive ichthyocoll + Fe(CN)6 " the normal valency rule of the anions has been reduced to only two terms, since K3Fe(CN)g and also K4Fe(CN)g, that is to say, 1 — 3 and 1 — 4 contain anions which themselves contract powerful complex relations with the ichthyocol cation, as a result of which dicomplex coacervation is produced. 

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