Detection of nitrification inhibitor dicyandiamide: A direct electrochemical approach

Autor: Thiyagarajan Natarajan, Manavalan Gopinathan, Murugan Thiruppathi, Omotayo Adeniyi, Jen-Lin Chang, Jyh-Myng Zen, Solomon Tesfalidet, Jyri-Pekka Mikkola
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Food Chemistry: X, Vol 18, Iss , Pp 100658- (2023)
Druh dokumentu: article
ISSN: 2590-1575
DOI: 10.1016/j.fochx.2023.100658
Popis: A single run approach for rapid detection of nitrification inhibitor, dicyandiamide (DCD) using electrogenerated chlorine assisted polymerization through azo bond, under acidic conditions and at a preanodized screen printed carbon electrode (SPCE*) is presented. The role of chloride containing support electrolyte in acidic medium along with oxygen functionalities/edge sites are found to be crucial for the successful oxidative polymerization and subsequent adsorption of oxidized products on the electrode surface. The SEM, cyclic voltammetry and X-ray photoelectron spectroscopy studies were used to characterize the polymer film formation. The system exhibited a linear range between 20 and 170 μM with a detection limit of 3 μM (S/N = 3). The method was successfully tested for the detection of DCD in dairy and water samples. Simultaneous detection of DCD in the presence of melamine has also been demonstrated.
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