Glycine is a simples non essential amino acid. It is present in high concentrators in central nervous system (CNS), involved in neural excitability Inhibitory neurotransrnissions in the mammalian CNS is mainly mediated by glycine. In the present investigation studied the cornplexing properties of glycine molecule with trace metal ions such as Fe+3, Al+3, Cr+3, Mg+2, Zn+2, Ca+2, Cu+2’, Ni+2 and Co+2. Potentiometrically and spectrophotornetrically the role ratio method were applied for the calculation of mole ratio between metal ions and ligand molecules.


M NIAZ ,F S REHMANI ,