Speciation of binary complexes of Co(II), Ni(II), and Cu(II) with L-phenylalanine in anionic micellar medium

被引：5

作者：

Kumari, V. Gowri ^{[1
]}

Ramanaiah, M. ^{[1
,2
]}

Sailaja, B. B. V. ^{[1
]}

机构：

[1] Andhra Univ, Dept Inorgan & Analyt Chem, Visakhapatnam, Andhra Pradesh, India

[2] Aditya Inst Technol & Management, Dept Chem, Tekkali, India

来源：

CHEMICAL SPECIATION AND BIOAVAILABILITY | 2015年 / 27卷 / 03期

关键词：

Chemical speciation; L-phenylalanine; anionic surfactant; SLS; stability constants; CHEMICAL SPECIATION; HG(II); PB(II); CD(II); ACID;

D O I：

10.1080/09542299.2015.1087159

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Speciation of binary complexes of Co(II), Ni(II), and Cu(II) with L-phenylalanine (Phe) in the presence of water-anionic surfactant mixtures in the concentration range of 0.0-2.5% w/v SLS has been studied pH-metrically at a temperature of 303 K and at an ionic strength of 0.16 mol L-1. The selection of best fit chemical models is based on statistical parameters and residual analysis. The predominant species detected were ML, ML2, and ML2H2 for Co(II), Ni(II), and Cu(II). The trend in the variation of stability constants with the mole fraction of SLS was explained on the basis of electrostatic and non-electrostatic forces. Distribution of the species with pH at different compositions of SLS-water media was also presented.

引用

页码：121 / 126

页数：6

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