Phaeophyceae and rhodophyceae macroalgae from the Antarctic: A source of selenium

• Published in: Journal of food composition and analysis Vol. 88; p. 103430
• Main Authors: Guilherme, Juliana Rocha, Pacheco, Bruna, Soares, Bruno Meira, Pereira, Claudio Martin Pereira de, Colepicolo, Pio, Dias, Daiane
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01-05-2020
• Subjects: Antarctic algae characterization; Essential element; Food analysis; Food composition; Nutrient composition; Voltammetry; Nutrient composition; Voltammetry; Food composition; Food analysis; Antarctic algae characterization; Essential element
• ISSN: 0889-1575; 1096-0481
• DOI: 10.1016/j.jfca.2020.103430

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•Characterization of Antarctic macroalgae (Phaeophytas and Rhodophytas) with regard to Se content.•High accuracy method and a low concentration of Se could be quantified in the macroalgae using voltammetric method.•Macroalgae from the Antarctic is a source of Se for promising pharmaceutical and nutritional application.
This study reports the development of a voltammetric method applied for Se determination in Phaeophyceae (A. utricularis, C. jacquinotii, A. mirabilis, D. anceps, H. grandifolius) and Rhodophyceae (G. confluens, C. racovitzae, I. cordata) macroalgae from the Antarctic. Evaluation of the instrumental parameters showed the square wave cathodic stripping voltammetry provided greater sensitivity (deposition potential, -0.4 V; deposition time, 420 s; amplitude, 0.08 V; frequency, 60 Hz) than influence of differential pulse cathodic stripping voltammetry. The matrix effect and the influence of Cu concentration on the determinations were also assessed. After microwave-assisted digestion of the samples, the quantification limit was from 5.21 × 10−3 (G.confluens) to 9.85 × 10−3 mg kg-1 (I. cordata). The quantification of Se was carried out over the concentration range from 0.23 (C. jacquinotii) to 1.22 mg kg-1 (A. mirabilis). The method accuracy was by analysing the reference material of peach leaves (SRM 1547).