Electrochemical phosphate detection in oligotrophic seawater with a stand-alone plastic electrode Federico Figueredo Federico Girolametti Università Politecnica delle Marche, Italy Silvia Illuminati Università Politecnica delle Marche, Italy Cristina Truzzi Università Politecnica delle Marche, Italy Anna Annibaldi Università Politecnica delle Marche, Italy Sabina Susmel University of Udine, Italy This is a section of Eighth International Symposium “Monitoring of Mediterranean Coastal Areas. Problems and Measurement Techniques”(DOI: 10.36253/978-88-5518-147-1) by Donatella Carboni, Laura Bonora, Matteo De Vincenzi Firenze University Press Firenze 2020 https://doi.org/10.36253/978-88-5518-147-1.70

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The northern Adriatic Sea is a particular water system, in which the levels of nutrients are commonly low or unbalanced. In general, phosphate detection can be done with the classical molybdenum-blue method. However, the method cannot be used in oligotrophic seawater samples due to its low sensitivity and high interference problems. In this study, we present a new electrochemical method, based on the application of a plastic conductive electrode containing a molybdenum reagent embedded. The sensitivity for phosphate was high enough to detect this nutrient in oligotrophic seawater.

 Phosphate detection Oligotrophy Adriatic sea Plastic electrode Electrochemical detection Octamolybdate

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