The extraction equilibrium constant (Kex) was calculated by the
slope of the graph in Fig. 9 and was found to be 1.4172. The
stripping equilibrium constant (Kst) was calculated by the slope of
the graph in Fig. 10 and was found to be 1.0079. The distribution
ratio (D) at an aliquat 336 concentration of 6 mmol/L was
calculated by Eq. (6), as shown in Table 2. It was noted that the
distribution ratio increased with the extractant concentration, as
seen in an earlier report by Sunsandee et al. [35].