Artigo
Competition between humic substances and α-amino acids by metal species
Fecha
2004-08-30Registro en:
Journal of the Brazilian Chemical Society, v. 15, n. 3, p. 437-440, 2004.
0103-5053
10.1590/S0103-50532004000300016
S0103-50532004000300016
WOS:000221883800015
2-s2.0-4143108021
2-s2.0-4143108021.pdf
0000-0002-2042-018X
Autor
Universidade de São Paulo (USP)
Universidade Estadual Paulista (Unesp)
Univ. Federal do Mato Grosso do Sul
Resumen
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.