Evidence of Water in Organic Phase. One straight forward way to resolve this issue is to measure the amount of water in the organic phase using a standard Karl Fischer test after equilibrating a given amount of this phase with an aqueous salt solution. The results summarized in Table (Supplementary Materials) show that all organic solvents that are devoid of water to begin with collect certain amount of water after equilibration. The actual emulsification process is, however, more complex, as when the inverted emulsions are formed, the amount of water would be depleted from the organic phase. However, this loss would be compensated by the continuing transfer of water from the aqueous to the organic phase. To make a realistic assessment of the dynamic evolution of water in the organic phase, we designed an experiment by modifying a strategy that we reported in the past .