Fig. 1

The amount of residual contamination after electrochemical treatments under different charges and currents at constant 10 V. Mean ± SD (n = 5). *P < 0.05, **P < 0.01, ***P < 0.005
The amount of residual contamination after electrochemical treatments under different charges and currents at constant 10 V. Mean ± SD (n = 5). *P < 0.05, **P < 0.01, ***P < 0.005