A method of preparing a trace element solution includes the steps of providing at least one EDTA-complex, providing a sodium selenite solution, and combining the EDTA-complex(es) and the sodium selenite solution to form a trace element solution. An EDTA complex is prepared by using disodium EDTA or EDTA acid, selenium, and any other suitable mineral.
The invention discloses a trace element solution, which comprises at least one metal selected from the group comprising selenium, copper, zinc, manganese and chromium and which comprises a concentration of the metal(s) of at least 60 mg/ml. The solution further comprises at least one compound selected from the group comprising iodine, potassium iodide, sodium iodide, iron, iron chloride, zinc oxide, manganese sulphate, sodium selenite, copper carbonate, sodium carbonate, anhydrous disodium EDTA and sodium hydroxide. The trace element solution is prepared by a method consisting essentially of the steps of preparing a MnCO.sub.3 mixture in a container; adding an EDTA/NaOH mixture to the container and subsequently adding at least one metal compound; and adding Na.sub.2SeO.sub.3 to the container to obtain the trace element solution. The method also comprises the step of adding CrCl.sub.3.6H.sub.2O to the trace element solution.
