Table 1.

Logarithmic selectivity coefficients of gold nanoporous membrane based Cu²⁺‐selective electrodes.

Ion [J]	$\mathrm{l}\mathrm{o}\mathrm{g}{K}_{\mathrm{C}\mathrm{u},\mathrm{J}}^{\mathrm{p}\mathrm{o}\mathrm{t}}$
	Cu2+‐selective nanopore	peptide‐free nanopore	conventional ionophore‐based ISEs
Na+	−5.56	−0.71	−3.7,[b] −4.61[d]
K+	−5.71	−0.30	−2.4,[a] −3.7,[b] −4.74[d]
Li+	−5.70	−0.84
Cs+	−5.76	0.16
H+	−2.07	−0.08	−0.44[d]
Ca2+	−3.63	−0.27	−4.3,[b] −3.3,[c] −4.64[d]
Mg2+	−3.76	0.11	−4.0,[b] −3.3,[c] −6.26[d]
Zn2+	−4.26	0.04	−2.3,[a] −3.9,[b] −3.0,[c] −2.67[d]
Cd2+	−3.19	0.07	−4.4,[a] −4.4,[b] −2.7,[c] −3.34[d]
Ni2+	−2.97	−0.10	−3.3,[a] −3.9,[b] −3.0[c]
Pb2+	−3.08	0.02	−0.8,[a] −1.8,[b] −2.7,[c] −1.82[d]
Cr3+	−4.37	−0.50	−3.0[c]

[a] o‐xylylene bis(dithiocarbamate,15 [b] tetraethylthiuram disulfide,16 [c] salicylaniline,17 [d] N,N,N′,N′‐tetracyclohexyl‐3‐thiaglutaric diamide.18