Alternative coulometric signal readout based on a solid-contact ion-selective electrode for detection of nitrate

Recent progress in the development of porous carbon-based electrodes for sensing applications

“…Following this type of configuration, Wang and co-workers investigated the use of commercial OMCs as transducers on a SC-ISE for coulometric nitrate detection. 99 The authors reported suitable nitrate quantification with reproducible responses related to the high electrical power of OMCs acting as an electrochemical double-layer supercapacitor (Fig. 4c).…”

Ionophore-based ion-selective electrodes: signal transduction and amplification from potentiometry

“…Besides conducting polymers, Qin and co-workers also used a layer of ordered mesoporous carbon as the ion-toelectron transducer for NO 3 − -selective SC-ISEs. 32 Prussian blue was also adopted in the study of the capacitive model to detect Na + . 25 In the case of Pb 2+ selective ISEs, the current response was found to be limited by the ion transport in the conducting polymer layer, which is likely caused by the sequestration of Pb 2+ by PEDOT(PSS).…”

Translating potentiometric detection into non-enzymatic amperometric measurement of H2O2

“…The glassy carbon (GC) disk electrode with the diameter of 3 mm was carefully polished with 0.05 μm Al 2 O 3 slurry, and then cleaned with ethanol and deionized water under the ultrasonic condition for 2 min, respectively. The OMC suspension (3 mg/mL) was prepared according to the reported literature [26], and then drop cast on the polished GC electrode. After being dried at room temperature, the GC electrode modified with OMC as solid contact (GC/OMC) was obtained for further use.…”