. 2018 Oct 19;18(10):3555. doi: 10.3390/s18103555

Table 3.

Selectivity coefficients for selected ions obtained for NH₄⁺- and NO₃⁻-selective electrodes using acetate sheet/graphite—based substrate and MMA-DMA based membrane composition.

NH₄⁺-Selective Electrode			NO₃⁻-Selective Electrode
Ion	Slope ± S.D.	$l o g K_{I, J}^{p o t}$ ± S.D.	Ion	Slope ± S.D.	$l o g K_{I, J}^{p o t}$ ± S.D.
Na⁺	45.67 ± 1.0	−1.56 ± 0.01	Cl⁻	−42.89 ± 0.9	−2.24 ± 0.05
K⁺	46.88 ± 1.5	−0.65 ± 0.20	SO₄²⁻	−24.82 ± 1.9	−2.59 ± 0.80
Ca²⁺	25.45 ± 2.6	−2.77 ± 0.20	NO₂⁻	−42.80 ± 0.8	−2.83 ± 0.08
NH₄⁺	52.96 ± 0.5	0	NO₃⁻	−49.45 ± 1.3	0