Evaluation of aluminum lability in yerba mate infusions by adsorptive cathodic stripping voltammetry

Quimica nova

Quináia, Sueli Pércio¹  Anjos, Vanessa Egéa dos²  Campos, Bruna Kauely de²  Prazeres, Jéssica Pacheco dos²  Torres, Yohandra Reyes² 

[1] Universidade Estadual de Ponta Grossa, Ponta Grossa, Brasil;Universidade Estadual do Centro-Oeste, Guarapuava, Brasil

关键词: speciation;    aluminum;    tea;    1;    2-;    dihydroxyanthraquinone-;    3-;    sulfonic acid.;   

DOI  :  10.5935/0100-4042.20140226

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Infusions of yerba mate obtained at different stages of industrialization were evaluated to determine the bioavailable fraction of Al. Adsorptive Cathodic Stripping Voltammetry using DASA (complexing agent) was applied to determine the labile fraction of Al at pH 5.0 and pH 8.0 for the total fraction of dissolved Al. The results indicate that on average 60% of Al is complexed with organic compounds, minimizing their bioavailability; however, the labile fraction exceeds by up to 4 times the maximum weekly intake recommended by the World Health Organization.

【 授权许可】

CC BY