Electrode Modifier pH range isothermal Coefficients (V/°C) ISPE 22 mg NaTPB 2.0–6.0 0.267 ISPE 16 mg RN 2.0–6.0 0.319 ISPE 30 mg PTA 2.0–6.0 0.291 IPVC 7.5 mg TPB 2.0–6.0 0.279 IPVC 7.5 mg PMA 2.0–6.0 0.329 IPVC 7.5 mg PTA 2.0–6.0 0.226 ICPE 10 mgNaTPB 3.0–7.0 0.269

Table 4: pH working range and isothermal coefficients of the proposed electrodes.