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  • Title: Electrochemical detection of chloride ions using Ag-based electrodes obtained from compact disc.
    Author: Patella B, Aiello G, Drago G, Torino C, Vilasi A, O'Riordan A, Inguanta R.
    Journal: Anal Chim Acta; 2022 Jan 15; 1190():339215. PubMed ID: 34857136.
    Abstract:
    In this work electrochemical sensors fabricated from compact disc material (waste or new) are used to quantify chloride ions in different types of samples. All three electrodes, working, counter, and pseudo-reference electrodes, were fabricated from the compact disc and directly used. Different parameters were studied in order to demonstrate the possibility of using this waste material for efficient and low-cost electrochemical sensors. Chloride sensing performance was evaluated using linear scan voltammetry as the detection technique. A sensitivity of 0.174 mA mM-1 cm-2 with a limit of detection of 20 μM and excellent selectivity against many interferents was observed. Selectivity and reproducibility tests were also carried out, showing excellent results. Sensors were also validated with real samples (drinking and sea water, milk, sweat and physiological solutions) with results comparable to conventional techniques. Our results show the applicability and suitability of these low-cost sensors, for detection of those analytes for which, silver, has high sensitivity and selectivity.
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