Study of the Histamine Electrochemical Oxidation Catalyzed by Nickel Sulfate

Démo Koita (1) , Théodore Tzedakis (2) , Cheikhou Kane (1) , Mahy Diaw (1) , Oumar Sock (1) , Pierre Lavedan (3)

1 UCAD - Université Cheikh Anta Diop de Dakar [Sénégal]
2 LGC - Laboratoire de Génie Chimique
3 ICT - Institut de Chimie de Toulouse

Thin layer technique was applied to the indirect anodic oxidation of histamine, catalyzed by NiSO4. Coulometric determination of the electron number demonstrates that histamine complexes Ni(II) and resulting adducts can be electrochemically oxidized in a single‐electron reaction, to lead Ni(III)‐histamine. The system Ni(III)/Ni(II) acts as ‘redox mediator’ for histamine oxidation. The equilibrium constant of the Ni(II)‐histamine complex formation was 106 , value showing the strong affinity between species. High content of histamine (>0.1 M), detected in fresh fish (previously exposed to the sun) extracts, showing potentialities for future design of a sensor for direct measurement in fish.

Mots clés: Histamine oxidation; Electrochemical thin layer; Nickel; catalyst

Domaines: Génie chimique; Génie des procédés

Démo Koita, Théodore Tzedakis, Cheikhou Kane, Mahy Diaw, Oumar Sock, et al.. Study of the Histamine Electrochemical Oxidation Catalyzed by Nickel Sulfate. Electroanalysis, 2014, 26 (10), pp.2224-2236. ⟨10.1002/elan.201400155⟩. ⟨hal-01899459⟩