Table 1: Electrochemical data for cyclic voltammetry of dyes (5 × 10−5 M) at modified (montmorillonite) GCE in the presence of  0.1 M H2SO4.

Dye /s−1 /V /V /V /

50.1900.1320.0580.6827.14
100.1950.1320.0630.7423.00
200.1900.1310.0670.9116.31
400.2010.1300.0710.8914.00
Thionine600.2060.1280.0780.9012.70
1000.2100.1250.0850.8712.65
1500.2150.1220.0930.8411.88
2000.2200.1200.1000.7811.63
3000.2200.1150.1050.8010.96

50.1750.1250.0500.4019.28
100.1780.1230.0550.4114.28
200.1800.1220.0580.7410.99
400.1820.1220.0600.798.50
Azure C600.1840.1210.0630.858.19
1000.1850.1200.0650.888.06
1500.1900.1180.0720.897.49
2000.1950.1160.0790.937.15
3000.2050.1120.0930.946.94

50.0850.0320.0530.3532.14
100.0900.0280.0620.4717.00
200.0950.0280.0670.5113.12
400.1000.0260.0740.5610.75
Azure A600.1050.0250.0800.579.63
1000.1100.0200.0900.539.33
1500.1120.0180.0940.538.78
2000.1180.0150.1030.538.50
3000.1250.0100.1150.557.68

50.1100.0550.0550.4215.00
100.1150.0520.0630.4811.50
200.1180.0500.0680.449.57
400.1230.0480.0750.537.50
Azure B600.1250.0420.0830.536.96
1000.1300.0400.0900.506.96
1500.1400.0350.1050.526.20
2000.1450.0300.1150.545.81
3000.1500.0270.1230.555.66

50.1550.1100.0450.503.57
100.1600.1080.0520.503.00
200.1650.1060.0590.502.48
400.1700.1040.0640.692.00
Methylene blue600.1750.1020.0730.721.84
1000.1800.1000.0800.751.89
1500.1850.0980.0870.613.36
2000.1900.0960.0940.643.13
3000.2000.0920.1080.703.10