Vol.4, No.1 (2011), 124-131 Table-2:Mixed ligand system with Lead Pb (II) [All replicate measurements were made] at (303±2K).E½ (Pb+2 metal ion) = 0.409 volts,id (Pb+2 metal ion) = 3.60 µ A
Concentration of mixed ligands x 102 M CA CX 0.6 2.0 1.0 2.0 2.0 2.0 3.0 2.0 4.0 2.0 2.0 0.6 2.0 1.0 2.0 3.0 2.0 4.0
C.M.M.S. Valinate System Log Im/Ic ∆ E½(V) 0.018 0.078 0.022 0.085 0.036 0.095 0.067 0.100 0.075 0.103 0.057 0.074 0.062 0.083 0.084 0.102 0.101 0.106
C.M.M.S. Alaninate System Log Im/Ic ∆ E½(V) 0.022 0.072 0.036 0.079 0.046 0.089 0.062 0.095 0.067 0.097 0.046 0.068 0.051 0.077 0.090 0.097 0.125 0.100
C.M.M.S. Glutaminate System Log Im/Ic ∆ E½(V) 0.031 0.065 0.051 0.071 0.062 0.081 0.073 0.085 0.084 0.091 0.058 0.060 0.066 0.067 0.101 0.088 0.148 0.092
C.M.M.S. Aspartate System Log Im/Ic ∆ E½(V) 0.036 0.056 0.057 0.063 0.078 0.072 0.090 0.077 0.096 0.081 0.062 0.051 0.067 0.059 0.120 0.077 0.207 0.080
Table-3:Mixed ligand system with Thallium TI (I) [All replicate measurements were made] at (303±2K). E½ (TI+2 metal ion) = 0.457 volts, id (TI+2 metal ion) = 3.14 µ A
Concentration of mixed ligands x 102 M CA CX 0.6 2.0 1.0 2.0 2.0 2.0 3.0 2.0 4.0 2.0 2.0 0.6 2.0 1.0 2.0 3.0 2.0 4.0
C.M.M.S. Valinate System Log Im/Ic ∆ E½(V) 0.980 0.064 1.075 0.071 1.102 0.080 1.117 0.086 1.150 0.090 1.009 0.060 1.029 0.068 1.060 0.088 1.117 0.093
C.M.M.S. Alaninate System Log Im/Ic ∆ E½(V) 1.019 0.061 1.045 0.068 1.073 0.077 1.090 0.082 1.105 0.086 1.009 0.058 1.032 0.066 0.117 0.084 0.133 0.089
C.M.M.S. Glutaminate System Log Im/Ic ∆ E½(V) 1.095 0.056 1.132 0.063 1.182 0.072 1.193 0.078 1.219 0.081 1.060 0.052 1.165 0.061 1.167 0.082 1.203 0.084
C.M.M.S. Aspartate System Log Im/Ic ∆ E½(V) 1.045 0.041 1.060 0.054 1.090 0.064 1.133 0.070 1.150 0.074 1.019 0.044 1.073 0.052 1.117 0.073 1.150 0.078
Table-4 Carboxymethyl Carboxymethyl Carboxymethyl Carboxymethyl Mercapto Succinate Valinate Mercapto Succinate Alaninate Mercapto Succinate Glutaminate Mercapto Succinate Asparatate System with; System with; System with; System with; _____________________________________________________________________________________________ S.No. Cd(II) Pb(II) TI(I) Cd(II) Pb(II) TI(I) Cd(II) Pb(II) TI(I) Cd(II) Pb(II) TI(I) _____________________________________________________________________________________________ 1. Co-ordination 1.006 1.02 1.109 1.031 1.08 1.06 0.981 1.11 1.08 0.978 1.10 1.19 number “i” of ligand A 2. Co-ordination number “j” of ligand X
1.39
1.31
1.396
POLAROGRAPHIC STUDY OF MIXED LIGAND
1.355
1.40
130
1.31
1.27
1.42
1.38
1.35
1.37
1.43
Seema Agarwal and S. Kalpana