Thermal modulation voltammetry (TMV) has been developed for determining standard entropy of ion transfer across an oil/water interface, Δ
S°
tr,O→W. Fundamentals and experiments for TMV are described, and Δ
S°
tr,O→W for ion transfer of 1-alkylprydinium ions across a 1,2-dichloroethane/water interface are discussed.
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