Synthesis and Characterization of Organic-Inorganic Nanocomposite Poly-o-anisidine Sn(IV) Arsenophosphate: Its Analytical Applications as Pb(II) Ion-Selective Membrane Electrode

Table 3

K_d-values of some metal ions on poly-o-anisidine Sn(IV) arsenophosphate composite cation exchanger in different solvent systems.

Solvents	Metal ions
	Sr^2+	Ba^2+	Pb^2+	Ca^2+	Hg^2+	Mg^2+	Th^4+	Cu^2+	Cd^4+	Ni^2+	Cr^3+	Al^3+	Fe^2+	Ce^3+	Co^4+
DMW	172	26	400	32	60	88	165	139	271	100	200	38	50	250	66
0.1 molL^-1   HCl	29	63	200	48	44	23	100	—	27	67	200	83	114	—	20
0.01  molL^-1   HCl	54	122	766	112	44	38	38	543	59	15	67	29	29	322	85
0.001 molL^-1   HCl	53	300	600	105	291	103	86	356	125	300	200	—	300	22	84
0.1 molL^-1   HNO3	23	88	—	187	35	29	103	30	57	114	250	100	—	—	—
0.01 molL^-1   HNO3	36	50	571	258	222	12	230	217	57	118	33	60	100	292	42
0.001 molL^-1  HNO3	26	27	187	136	333	3	55	67	18	86	39	250	114	483	59
10% Formic acid	63	—	767	80	222	37	55	167	20	22	93	60	450	—	29
20% Acetone	178	575	733	189	11	30	74	367	137	267	29	19	800	657	8
0.1 molL^-1   H2SO4	—	25	33	91	169	55	—	11	—	—	86	29	—	—	—
0.01 molL^-1   H2SO4	11	171	556	136	500	26	96	74	181	33	67	48	86	517	186
10% Ethanol	126	250	1250	256	—	75	50	340	650	38	33	10	200	500	36
Buffer 10	59	133	70	60	93	850	—	84	—	—	67	59	145	—	—
0.1 molL^-1 KCl	57	—	800	145	—	49	14	164	69	—	100	48	200	128	28
Ph 5.75	152	200	140	371	—	173	152	215	1033	—	—	280	86	—	34