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Study of the Histamine Electrochemical Oxidation Catalyzed by Nickel Sulfate
Author(s) -
Koita Démo,
Tzedakis Theodore,
Kane Cheikhou,
Diaw Mahy,
Sock Oumar,
Lavedan Pierre
Publication year - 2014
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201400155
Subject(s) - histamine , chemistry , nickel , catalysis , redox , electrochemistry , coulometry , inorganic chemistry , organic chemistry , electrode , biology , endocrinology
Thin layer technique was applied to the indirect anodic oxidation of histamine, catalyzed by NiSO 4 . 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 10 6 , 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.