Human skin is permselective for the small, monovalent cations sodium and potassium but not for nickel and chromium.

The molar conductance of excised human skin (Λ(skin)) immersed in electrolyte solutions comprising four cationic (Na(+), K(+), Ni(2+), and Cr(3+)) and five anionic (Cl(-), NO3(-), SO4(2-), CrO4(2-), and Cr2O7(2-)) species was determined as a function of concentration in Franz diffusion cells. Cation transport numbers for four of these electrolytes were… CONTINUE READING