Fig. 2. Representative integrated coulombs for different concentrations of thiourea in 0.1 M NaOH at an Au electrode by
Ž. integrated pulsed amperometry. E1: 620 mV 400 ms ; E2:
Ž. Ž . 1000 mV 50 ms ; E3: 300 mV 600 ms ; flow rate: 1.4
Ž. 6
Ž. mlmin; concentration of thiourea: a 1.010 M; b
6
Ž. 6
Ž. 6
Ž. 3.010 M; c 5.010 M; d 8.010 M; e 1.0
5
Ž. 5
Ž. 5
Ž. 5
10 M; f 3.010 M; g 5.010 M; h 8.010
Ž. 4
Ž. 4
Ž. 4
Ž. M; i 1.010 M; j 4.010 M; k 8.010 M; l
1.010
3
M