Three current regions of a polarogram: (P4) residual current region残余电流 2 charge transfer controlled region电荷转移控制电流 3 limiting current region极限扩散电流Three current regions of a polarogram : (P47 ) 1.residual current region残余电流 2.charge transfer controlled region 电荷转移控制电流 3.limiting current region 极限扩散电流