Abstract
Simple, elegant, and reproducible back-titration methods for the determination of arginine, histidine, threonine, glutamine, alanine, lysine, glycine, and serine in free state and in Zn, Cd, Ni, Cu, Ba, Sr, Mn, and Ag metal complexes with chloramine-B have been developed. The oxidation reaction involves a four-electron change per mole of amino acid, but a six-electron change is noticed with glycine and serine in various solvent and buffer media. The proposed analytical procedures for the assay of amino acids are useful for computing the number of amino acid ligands present in the respective metal complexes. The aromatic sulfonyl haloamine used, CAB, was prepared and then characterized by 1H and 13C FT-NMR spectral data.
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