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

Autor(es)

Guilherme, Juliana Rocha ^[1] ; Pacheco, Bruna ^[2] ; Soares, Bruno Meira ^[1] ; Pereira de Pereira, Claudio Martin ^[2] ; Colepicolo, Pio ^[3] ; Dias, Daiane ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Rio Grande, Escola Quim & Alimentos, Lab Eletroespectro Analit LEEA, Av Italia, Km 8, BR-96203900 Rio Grande, RS - Brazil

^[2] Univ Fed Pelotas, Ctr Ciencias Quim Farmaceut & Alimentos, BR-96001970 Capao Do Leao, RS - Brazil

^[3] Univ Sao Paulo, Inst Quim, BR-05508900 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Food Composition and Analysis; v. 88, MAY 2020.
• Citações Web of Science: 0

Resumo

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 x 10(-3) (G.confluens) to 9.85 x 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). (AU)

• Processo FAPESP: 16/06931-4 - Biodiversidade e prospecção de algas de águas tropicais e da Antártica marítima
• Beneficiário: Pio Colepicolo Neto
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático