FT-IR and XRD Analyses of Commercial Methionine-Mineral Chelates
Jaehong Han, Yong-Seok Chi, Bok‐Kyu Shin, Sang-Kyu Kim, In-Kee Paik · Journal of Applied Biological Chemistry · 2006
Compositions of methionine-metal chelates have been investigated by FT-IR and XRD studies to elucidate their molecular structures. It was concluded that Copamin and Zincamin contain a high percentage of crystalline products, presumably 2:1 Methionine-Cu or Zn complexes. On the contrary, FT-IR and XRD spectra of Ferramin didn't show any characteristics of the chelate and it was concluded to contain major components of starting and methionine without chelation.