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

Journal of the Brazilian Chemical Society

Rocha, Julio Cesar¹  Universidade Estadual Paulista, Sorocaba, Brazil¹  Rezende, Maria Olimpia de O.¹  Santos, Ademir dos¹  Corbi, Pedro Paulo¹  Rosa, André Henrique¹  Universidade de São Paulo, São Carlos, Brazil¹  Universidade Federal do Mato Grosso do Sul, Campo Grande, Brazil¹  Melnikov, Petr¹  Universidade Estadual Paulista, Araraquara, Brazil¹  Bellin, Iramaia C.¹  Cuin, Alexandre¹ 

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

DOI  :  10.1590/S0103-50532004000300016

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

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

Unknown