Investigation of drift correction and lifetime extension strategies for electrochemical nitrite sensors

Amina Brahem (Autor)

Buch | Softcover

316 Seiten

2025
Universitätsverlag Chemnitz
978-3-96100-244-3 (ISBN)

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Excessive nitrite in water poses serious health and environmental risks, requiring reliable long-term monitoring. Electrochemical sensors offer advantages due to their sensitivity, low cost, and ease of use; however, they suffer from aging, which affects accuracy over time. This thesis addresses this limitation by developing and optimizing a nitrite sensor based on screen-printed carbon electrodes modified with electrodeposited gold. The sensor achieved promising performance, including a 15-day shelf life. A multidisciplinary study investigated aging mechanisms using electrochemical techniques (voltammetry, impedance spectroscopy) and physical methods (Raman, FTIR, SEM). The double-layer capacitance (Cdl) was identified as the most aging-sensitive parameter. An accelerated aging protocol in contaminated solution was designed to simulate long-term behavior. A systematic methodology for lifetime estimation, drift correction, and life extension was proposed. Applying an anti-fouling polymer layer extended the shelf life to 18 days. A novel correction method ensured accuracy despite aging and was validated in tap and groundwater. The approach enables sensor optimization and reliability in environmental applications.

Erscheinungsdatum	15.10.2025
Reihe/Serie	Scientific Reports on Measurement and Sensor Technology ; 34
Zusatzinfo	Illustrationen, Diagramme
Verlagsort	Chemnitz
Sprache	englisch
Maße	148 x 210 mm
Gewicht	460 g
Themenwelt	Technik ► Elektrotechnik / Energietechnik
Schlagworte	Alterung • Elektrochemischer Sensor • Impedanzspektroskopie • SW1 • SW2 • SW3
ISBN-10	3-96100-244-4 / 3961002444
ISBN-13	978-3-96100-244-3 / 9783961002443
Zustand	Neuware