Table 5.

Selectivity coefficients, log $K_{\text{AgJ}}^{\text{Osel}}$, and exchange constants, log $K_{\text{exch}}^{\text{Ag}}$, for Ag⁺-selective fluorescent bulk optode microspheres

Ion	IX		X
	log $k_{\text{AgJ}}^{\text{Osel}}$; pH 7.4, α = 0.5	log $K_{\text{exch}}^{\text{Ag}}$	log $k_{\text{AgJ}}^{\text{Osel}}$; pH 7.4, α = 0.5	log $K_{\text{exch}}^{\text{Ag}}$
Ag+	0a	−1.0	0b	0.9
Li+	−7.1	−8.1	−10.0	−9.1
Na+	−8.0	−9.0	−9.2	−8.3
K+	−7.8	−8.8	−9.1	−8.2
Mg2+	−9.6	−18.3	−12.6	−19.4
Ca2+	−8.1	−16.8	−9.9	−16.7
Cu2+	−6.6	−15.3	−7.3	−14.2
Cd2+	−8.3	−17.0	−8.2	−15.0
Hg2+	−3.5	−12.3	−3.8	−10.7

^aLower detection limit: 5 × 10⁻⁹M Ag⁺.

^bLower detection limit: 2 × 10⁻¹¹M Ag⁺.