| 摘要 |
<p>The invention discloses a method of preparing a trace element solution, which includes the steps of providing at least one EDTA-complex; of providing a sodium selenite solution; and of combining the EDTA-complex(es) and the sodium selenite solution. The invention further discloses at least one EDTA complex prepared by using disodium EDTA or EDTA acid; selenium; and any other suitable mineral</p> |
