For 1 L Total 1. Dissolve Na2EDTA in 700 mL of dH2O. 2. Adjust the pH to 7.5. 3. Dissolve Fe(NH4)2(SO4)2.6H2O in 100 mL of dH2O. 4. Add the two solutions together and bring the final volume to 1 L with dH2O.
Stock Solution Concentration
Na2EDTA•2H2O (Sigma ED255)
Fe(NH4)2(SO4)2•6H2O (Sigma F-1513)
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