User:Geetugambhir68/Temp/Table 1.doc

Table 1: Variation of Emf with Concentration of Cd(II) ion.

S. No.	Concentrations of solution ( M)	- Potential ( mV )
1	1 x10-1	5
2	5 x10-2	7
3	1 x10-2	23
4	5 x10-3	31
5	1 x10-3	66
6	5 x 10-4	74
7	1 x10-4	83
8	5 x 10-5	85
9	1 x 10-5	86
10	5 x 10-6	85
11	1 x 10-6	84

Table 2: Effect of pH on Potential of Cd⁺⁺ ion in Solution.

S. No.	pH of sample	-Potential (10-4 M) ( mV)	- Potential (10-5 M) (mV)
1	2	15.8	18.8
2	3	33.5	39.8
3	4	43.0	48.0
4	5	43.2	47.8
5	6	42.8	47.2
6	7	42.5	47.5
7	8	48.9	52.8
8	9	31.3	34.5
9	10	21.5	26.8
10	11	13.4	17.7

Table3: Effect of Partially Non-aqueous Media on the Working of Cd(II) Selective Electrode.

S.No.	Non-aqueous content ( %v/v)	working Conc. Range (M)	slope (mV /decade)
1	0	1x10-6 – 1x10-1	33
2	Ethanol 10 25 50	1x10-6 – 1x10-1 1x10-6 – 1x10-1 1x10-6 – 1x10-1	32 31 29
3	Acetonitrile 10 25 50	1x10-6 – 1x10-1 1x10-6 – 1x10-1 1x10-6 – 1x10-1	34 34 34
4	Acetone 10 25 50	1x10-6 – 1x10-1 1x10-6 – 1x10-1 1x10-6 – 1x10-1	33 31 30

Table 4: Selectivity Coefficient Values for Cd(II) Selective Electrode as

Calculated by Fixed Interference Method.

S.No.	Interfering ion	Selectivity coefficient(-log K pot ter-polymer)
1	K+	6.8x10-3
2	Li+	1.2x10-3
3	Ca++	3.1x10-4
4	Sr++	2.7x10-4
5	Cu++	2.1x10-4
6	Ni++	1.1x10-3
7	Pb++	1.8x10-3
8	Fe+++	2.3x10-5
9	Al+++	1.2x10-4

Table 5: Values of Electrode Potential For 0.01 M Cd(II) solution in the

Presence of interfering metal ions.

S. No	Conc. of Cd(II) solution (M)	Conc. of interfering ions (M)	Potential (mV) K+	Potential (mV) Ca++	Potential (mV) Fe+++
1	1x10-2	1x10-1	17	10	10
2	1x10-2	1x10-2	28	19	21
3	1x10-2	1x10-3	29	26	28
4	1x10-2	1x10-4	28	27	29
5	1x10-2	1x10-5	29	28	30

Table 6: Effect of Detergent on Working of Cd(II) Selective Electrode

S. No.	Conc. of solution (M) 1x10-5	-Potential(mV) Surf excel	-Potential(mV) Ariel	Potential (mV) wheel
1	20 + 5 ml 1 % detergent	53	24	29
2	20 + 5 ml 2 % detergent	42	21	23
3	20 + 5 ml 3 % detergent	25	19	19
4	20 + 5 ml 4 % detergent	19	17	17
5	20 + 5 ml 5 % detergent	16	16	16

Table 7: Variation of Potential with Cd(II) ion for different Cd salts.

S.No.	Conc. of Cd(II) solution	Potential(mV) Cd(NO3)	Potential(mV) CdCl2∙2.5H2O	Potential(mV) CdSO4∙8H2O
1	1x10-1	2	2	10
2	5x10-2	7	8	18
3	1x10-2	23	30	29
4	5x10-3	31	37	35
5	1x10-3	66	62	54
6	5x10-4	74	70	63
7	1x10-4	83	82	68
8	5x10-5	85	87	74
9	1x10-5	86	92	77
10	5x10-6	85	95	80
11	1x10-6	84	102	80
12	5x10-7	85	103	80

Table 8: Titration Data for 1x10^-3 M Cd(II) Solution with EDTA

S. No.	Volume of Cd(II) taken (ml)	Volume of EDTA added (ml)	-Potential(mV)
1	25.0	0.2	49
2	25.0	0.4	50
3	25.0	0.6	51
4	25.0	0.8	52
5	25.0	1.0	53
6	25.0	1.2	55
7	25.0	1.4	59
8	25.0	1.6	60
9	25.0	1.8	60
10	25.0	2.0	61
11	25.0	2.5	61

Table 9: Effect of concentration of interfering ions on potential of Cd (II)

Solution.

S. No	Conc. of Cd(II) solution	Conc. of interfering ions	Potential K+	Potential Ca++	Potential Fe+++
1	1x10-2	1x10-1	17	10	10
2	1x10-2	1x10-2	28	19	21
3	1x10-2	1x10-3	29	26	28
4	1x10-2	1x10-4	28	27	29
5	1x10-2	1x10-5	29	28	30

Table 10: Effect of Detergent and Surfactant on Potential of Cd(II) Solution.

Conc. of Cd(II) solution	-Potential(mV) Without surfactant	-Potential(mV) Surfactant( 1%)	-Potential(mV) detergent( 1%)
1x10-1	2	2	00
5x10-2	7	8	4
1x10-2	23	17	15
5x10-3	31	27	26
1x10-3	66	30	27
5x10-4	74	35	28
1x10-4	83	36	30
5x10-5	85	37	35
1x10-5	86	39	36
5x10-6	85	40	37
1x10-6	84	41	36
5x10-7	85	42	36

Table 11: Functional Properties of Terpolymeric membrane

Membrane	Water content per g wet membrane ( g)	Porosity	Amount of KCl absorbed per g of membrane
Methyl acrylate-Acrylonitrile -Methyl methacrylate Terpolymer	0.22	0.051	3.5x10-2

Table 12 Response time for Cd(II) Selective Electrode in Solvents of

Different Polarity.

Conc. of Cd(II) solution	-Potential (mV) 25% ethanol	-Potential(mV) 25% acetone	-Potential(mV) 25% acetonitrile
1x10-1	7	14	12
5x10-2	10	21	18
1x10-2	27	42	42
5x10-3	32	49	58
1x10-3	56	75	76
5x 10-4	64	85	87
1x10-4	75	94	101
5x10-5	80	101	105
1x10-5	94	114	108
5x10-6	95	118	109
1x10-6	98	118	110
5x10-7	99	120	112

Legends

Figure 1: Variation of Emf With – log[Cd(II)] Ion.

Figure 2: Effect of pH of Solution on the Potential of Cd (II) Ion Selective Electrode.

Figure 3: Plots of EMF Versus -log[Cd(II)] Ions for Partially Non - Aqueous Media.

Figure 4: Variation of membrane potential of Cd(II) selective electrode in the presence of Ba²⁺ ion (FIM).

Figure 5: Effect of detergent and surfactant on the working of Cd(II) ion selective electrode.

Figure 6: Titration curve for potentiometric titration of 10^-3 M Cadmium (II) solution with10^-2 M with EDTA solution.