Table 3.

Selectivity coefficients (SSM, 0.1 M) and potentiometric response characteristics of sodium selective electrodes using compounds 1—changes in the properties of electrodes due to membrane irradiation (UV, 9 W)

Electrode	LDL [loga]	S [mV/dec]	LogK Na,K	LogK Na,NH4	LogK Na,Li	LogK Na,Ca	LogK Na,Mg
1gc′	−5.9	57.2	−2.5	−3.1	−2.8	−3.8	4.0
1gc′(UV) shortly after exposure	−5.2	56.3	−2.0	−2.0	−2.0	−3.4	−3.1
1gc′(UV) after 1 h	−6.1	60.2	−2.2	−2.8	−2.6	−3.5	−3.6
1gc′(UV) after 20 h	−6.1	59.7	−2.5	−2.9	−2.7	−3.8	−3.9

gc′—glassy carbon electrode, o-NPOE plasticizer (UV)—irradiated electrode