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

Table 2

Conditions of preparation and the ion exchange capacity of poly-o-anisidine Sn(IV) arsenophosphate composite cation exchanger.

Sample	Mixing volume ratios (v/v)			pH of the inorganic ion exchanger	Mixing volume ratios (v/v)		Appearance of the samples	Ion exchange capacity in meq/g
	0.1 molL^-1Na2HAsO4in DMW	0.1 molL^-1 SnCl4⋅5H2O in 1 molL^-1  HCl	0.1 molL^-1 H3PO4 in DMW		2.5%CH3OC6H4NH2 in 1 molL^-1  HCl	0.05 M (NH4)2S2O8 in 1 molL^-1  HCl
S-1	1	1	1	1	—	—	white granular	0.9
S-2	1	1	1	1	1	1	Blackish granular	0.99
S-3	1	1	2	1	1	1	Blackish granular	0.72
S-4	1.5	0.5	2	1	1	1	Blackish granular	0.45
S-5	—	—	—		1	1	Black powder	0.19
S-6	1	1	0.5	1	1	1	Blackish granular	0.5
S-7	1	1	0.5	1	1	1	Blackish granular	1.24
S-8	0.5	0.5	1	1	1	1	Blackish granular	1.2
S-9	1	1	0.5 (2 molL^-1)	1	1	1	Blackish granular	1.82
S-10	0.5	0.5	1 (2  molL^-1)	1	1	1	Blackish granular	0.52