Abstract
This work investigated the Cu K-edged XANES spectra of copper(II) chloride aqueous solution mixed with glycine aqueous solution by varying Cu(II):Glycine molar ratio with the XANES spectra of standard reference of copper and starting solution of CuCl2. Structural changes in these solutions are probed by X-ray absorption near-edge structure (XANES) spectra recorded in the vicinity of the copper K-edge for various Cu(II):Glycine molar ratios and for different pH. Comparison of spectra recorded for low and high concentrations of CuCl2 in the mixed solutions show rather different XANES profiles. Low concentration of CuCl2 in the mixed solutions without pH adjustment give also different XANES profiles from those obtained at a pH adjusted to 5.0. This highlights the importance of controlling these parameters for a proper determination of the various forms of metal complexes present in the mixed solutions.
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