Table 1.

Comparison of Z-potential values in water and in synthetic sweat.

Medium Specimen	Water	Synthetic Sweat T = 0	Synthetic Sweat T = 24 h
Co3O4	Mean: –19.8 +/− 1.15 mV	Mean: –18.5 +/− 3.5 mV	Mean: –15.9 +/− 4.2 mV