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Selective Curcuminoid Separation and Detection via Nickel Complexation and Adsorptive Stripping Voltammetry
Author(s) -
Wray David M.,
BatchelorMcAuley Christopher,
Compton Richard G.
Publication year - 2012
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.201200560
Subject(s) - curcuminoid , chemistry , curcumin , redox , stripping (fiber) , nickel , adsorptive stripping voltammetry , cyclic voltammetry , chelation , electrochemistry , voltammetry , inorganic chemistry , anodic stripping voltammetry , molecule , electrode , organic chemistry , materials science , biochemistry , composite material
Curcumin is a widely studied biologically active redox molecule. Although sensitive, electrochemical methods are commonly hindered by their lack of specificity. This article demonstrates how curcumin may be readily separated from other structurally and electrochemically similar redox moieties. This separation is achieved through exploitation of the molecules diketone functionality providing a route for its selective chelation to nickel(II). Recovery of the curcumin from the nickel complex is achieved simply and quantitatively through acidification of the precipitate. Adsorptive stripping voltammetry at a carbon screen‐printed electrode (SPE) is utilised both as a method for evidencing the effectiveness of the separation technique but further as a procedure for the analytical quantification of the curcumin concentration.