Competition between humic substances and α-amino acids by metal species

• Autor(a) principal: Dos Santos, Ademir [UNESP]
• Data de Publicação: 2004
• Outros Autores: Bellin, Iramaia C. [UNESP], Corbi, Pedro Paulo [UNESP], Cuin, Alexandre [UNESP], Rosa, André Henrique [UNESP], Rezende, Maria Olimpia de O., Rocha, Julio Cesar [UNESP], Melnikov, Petr
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S0103-50532004000300016; http://hdl.handle.net/11449/67837
• topic: α-amino acids; Humic substances; Metals; Soils; alpha amino acid; aluminum; cadmium; copper; cysteine; lead; manganese; metal; methionine; methionine sulfoxide; nickel; trace element; zinc; chemical bond; flow; humic substance; inductively coupled plasma optical emission spectrometry; spectrometry; time; ultrafiltration

The aim of the present work was to carry out experimental comparison between humic substances (HS) and representative α-amino acids (methionine, methionine sulfoxide and cysteine hydrochloride) in relation to the complexation of biologically active trace elements (Al, Cu, Pb, Mn, Zn, Cd and Ni). A mobile time-controlled tangential-flow UF technique was applied to differentiate between HS-metal and α-aminoacids-metal complexes. Metal determinations were conventionally carried out using a ICP-OES. The results showed that HS may be considered as a selective complexing agents with higher metal bonding capability in relation to Al, Cu and Pb, the fact that may be clinically important.