We compared the Nernstian slope and the response range of a solid contact electrode based on Tribenzylamine Ionophore with those based on Dibenzylaminodiphenylmethane Ionophore. Their Nernstian slopes showed, respectively, 55.1, 59.1 mV/pH (at 20 ± 0.2℃). Also, the linear pH response dynamic ranges were pH 2.48 - pH 11.21 for Tribenzylamine based SCEs, pH 0.80 - pH 9.70 for Dibenzylaminodiphenylmethane. When the Nernstian slope and the response range are considered, as the numbers of phenyl ring increased in the Ionophore, though the dynamic range and the Nernstian slopes of these electrodes didn't show particular different results, their response ranges moved toward acidic range (shifted to pH 0.8). When it was directly applied to the artificial serum (in pH range 6.0 - 8.5), we could obtain the same satisfying results. This electrode continuously contacted a Tris 7.10 buffered solution as well as the artificial serum for one month without any loss of performance. And, especially, these electrodes showed very good results such as the stabilization of base potential, the best reproducibility and the response time (< 14 sec.)