Tin(II) Selective PVC Membrane Electrode Based on Salicylaldehyde Thiosemicarbazone as an Ionophore

Table 4

Determination of Sn²⁺ concentrations in different artificially made samples.

Artificially made samples	Sn^2+ sensor (Found)	By Titration method
S-1 (25 ppm), 4.8 mg	4.7 mg ± 0.05	4.6 mg ± 0.08
S-2 (50 ppm), 9.6 mg	9.5 mg ± 0.04	9.7 mg ± 0.05
S-3 (75 ppm), 14.4 mg	14.8 mg ± 0.01	14.3 mg ± 0.07
S-4 (100 ppm), 19.2 mg	19.0 mg ± 0.09	19.1 mg ± 0.02
S-5 (125 ppm), 24.0 mg	24.1 mg ± 0.01	24.2 mg ± 0.04
S-6 (250 ppm), 48.0 mg	48.1 mg ± 0.08	48.5 mg ± 0.06
S-7 (500 ppm), 96.03 mg	96.2 mg ± 0.04	96.1 mg ± 0.08
S-8 (1000 ppm), 192.06 mg	192.1 mg ± 0.05	192.1 mg ± 0.04