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

Journal of the Brazilian Chemical Society

Ademir Dos Santos²  Iramaia C. Bellin¹  Pedro Paulo Corbi¹  Alexandre Cuin¹  André Henrique Rosa¹  Maria Olimpia De O. Rezende²  Julio Cesar Rocha¹  Petr Melnikov¹ 

[1] ,Universidade de São Paulo Instituto de Química de São Carlos São Carlos SP ,Brazil

关键词: humic substances;    soils;    metals;    alpha-amino acids;   

DOI  :  10.1590/S0103-50532004000300016

来源: SciELO

【 摘 要 】

The aim of the present work was to carry out experimental comparison between humic substances (HS) and representative alpha-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 alpha-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.

【 授权许可】

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