Monitoring Trace Amounts of Silver(I) in Water Samples Using a Potentiometric Sensor Based on 1,3-Bis(2-ethoxyphenyl)Triazene

This study reports a new silver(I) ion-selective electrode based on 1,3-bis(2-ethoxyphenyl)triazene as a neutral carrier for detection and determination of trace amounts of silver(I) in aqueous solutions. Nernstian electrode response (59.8 ± 0.7 mV decade⁻¹) for silver ion was observed over a wide concentration range (3.2 × 10⁻⁷ – 1.0 × 10⁻¹ M) with a low detection limit (8.5 × 10⁻⁸ M). The electrode revealed good selectivity toward Ag(I) ion over a wide variety of alkali, alkaline earth, transition, and heavy metal ions. The proposed silver(I) ion-selective electrode was used for the determination of Ag(I) in aqueous samples and as an indicator electrode in potentiometric titration of Ag(I) ions.