Reagent-free electrochemical-based detection of silver ions in aqueous solutions using localized pH control

摘要

Silver is more often used in consumer products and that in consequence leads to its release into the water. Quick and easy methods for detection of silver ions in water are required. In present work electrochemical-based sensor was developed for detection of silver ions in aqueous solutions. The solution's pH for detection was lowered either with nitric acid or reagent-free using localized pH control. Linear regions for the current peak height against the silver concentration have been found between 100-1000 nM and 250-5000 nM for samples acidified with nitric acid and using localized pH control respectively. In present work the limit of detection was lower than comparing to similar work without the need to modify the electrode.