Determination of vitamin K^sub 1^ using square wave adsorptive stripping voltammetry at solid glassy carbon electrode

A new electroanalytical method for determination of phylloquinone (vitamin K1) occuring in food samples of plant origin has been developed. Presented method is based on adsorptive accumulation of this biologically active compound onto the surface of solid glassy carbon electrode with subsequent elec...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2018-07, Vol.821, p.10
Main Authors: Sýs, Milan, Jashari, Granit, Švecová, Blanka, Arbneshi, Tahir, Metelka, Radovan
Format: Article
Language:English
Subjects:
Adsorptivity
Bioaccumulation
Bone density
Cell growth
Electrochemical analysis
Electrodes
Food
Glassy carbon
High performance liquid chromatography
Phylloquinone
Polycyclic aromatic hydrocarbons
Square waves
Stripping
Vitamins
Voltammetry
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Summary:A new electroanalytical method for determination of phylloquinone (vitamin K1) occuring in food samples of plant origin has been developed. Presented method is based on adsorptive accumulation of this biologically active compound onto the surface of solid glassy carbon electrode with subsequent electrochemical detection using square wave adsorptive stripping voltammetry in 0.1 M HCl. Two linear ranges of phylloquinone determination were 1.0 × 10−8–1.0 × 10−6 mol L−1 and 5.0 × 10−6–1.0 × 10−4 mol L−1 with the detection limits of 8.9 × 10−9 and 5.1 × 10−8 mol L−1, respectively. Obtained results have shown that square wave voltammetry with adsorptive accumulation step is very sensitive method for the determination of vitamin K1, being comparable to standard high performance liquid chromatography method for food analysis (EN 14148:2003).
ISSN:1572-6657
1873-2569