Reagent free electrochemical-based detection of silver ions at interdigitated microelectrodes using in-situ pH control

•Applying 1.65 V to a protonator electrode lowered the pH at the sensor electrode to pH 3, optimal for silver ion detection.•In-situ pH control eliminated the need for the addition of mineral acids to a solution before analysis.•Chlorine present in tap water helped in detection, causing a sharpening...

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