Chemical speciation of L-proline complexes of Ca(II), Zn(II) and Mn(II) in acetonitrile-water mixtures

被引：2

作者：

Veeraswami, Boddu ^{[1
]}

Bhushanavathi, Peketi ^{[2
]}

Viplavaprasad, Uppuleti ^{[3
]}

Rao, Gollapalli Nageswara ^{[3
]}

机构：

[1] Gitam Univ, Gitam Inst Technol, Visakhapatnam 530045, Andhra Pradesh, India

[2] St Josephs Coll Women A, Visakhapatnam 530004, Andhra Pradesh, India

[3] Andhra Univ, Sch Chem, Visakhapatnam 530003, Andhra Pradesh, India

来源：

CHEMICAL SPECIATION AND BIOAVAILABILITY | 2013年 / 25卷 / 02期

关键词：

stability constant; L-proline; acetonitrile; MINIQUAD75; 1,2-PROPANEDIOL-WATER MIXTURES; AMINO-ACIDS; PROTEINS; CD(II); NI(II); EQUILIBRIA; CU(II); CO(II); HUMANS; PB(II);

D O I：

10.3184/095422913X13692356137900

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：

Chemical speciation of binary complexes of Ca(II), Zn(II) and Mn(II) with L-proline is investigated pH-metrically in acetonitrile-water mixtures. The stability constants are calculated using the computer program MINIQUAD75. The best-fit chemical models are selected based on statistical parameters and residual analysis. The models for the binary species contained ML+, MLH2+ and ML2H+ for Ca(II), Zn(II) and Mn(II). The trend in variation of stability constants with change in the dielectric constant of the medium is explained on the basis of structure forming nature of acetonitrile. Distribution of the species with pH at different variations (0.0-60.0% v/v) in acetonitrile-water mixtures is also presented.

引用

页码：147 / 151

页数：5

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