Journal article Open Access

Chemical, speciation of L-glutamic acid complexes of some toxic metal ions in DMSO-water mixtures

K. Bharath Kumar Naik; B. Anand Kumar; S. Raiu; G. Nageswara Rao

School of Chemistry, Andhra University, Visakhapatnam-530 003, Andhra Pradesh, India

E-mail gollapallinr@yahoo.com

Manuscript received 26 July 2011, revised 29 December 2011, accepted 29 December 2011

Chemical speciation of L-glutamic: acid complexes of Some toxic metal ions has been investigated pH-metrically In DMSO-water mixtures (0-60% v/v) at 303 K and ionic: strength of 0.16 mol L-1. The predominant species detected for PbII and CdII are ML2H4, ML2H3, ML2H2, ML2 and ML and for HgII are ML2H4, ML2H3, ML2H2 and ML. The trend!! in variation of stability constants of the complexes with dielectric: constant of the medium are attributed to the electrostatic: and non-electrostatic: forces.

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