Chemical characteristics and relative bioavailability of supplemental organic zinc sources for poultry and ruminants.

@article{Cao2000ChemicalCA,
  title={Chemical characteristics and relative bioavailability of supplemental organic zinc sources for poultry and ruminants.},
  author={J. Cao and Pamela R. Henry and R Guo and Robert Holwerda and John P. Toth and Ramon C. Littell and Richard D. Miles and Clarence B. Ammerman},
  journal={Journal of animal science},
  year={2000},
  volume={78 8},
  pages={
          2039-54
        }
}
Eight commercially available organic Zn products and reagent-grade ZnSO4 x 7H2O (Zn Sulf) were evaluated by polarographic analysis, and solubility in .1 M K2HPO4-KH2PO4 buffer (pH 5), .2 M HCl-KCl buffer (pH 2), and deionized water. Fractions from these solubility tests were evaluated by gel filtration chromatography for structural integrity. Degree of chelation was generally positively related to chelation effectiveness determined by polarography. The organic sources were Zn methionine complex… 

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References

Biological Assay of Inorganic Manganese for Chicks

A suitable assay for biological availability of the element manganese is not available, and little is known of the relative utilization of the various supplemental sources by the chick.