Prepare 800 mL of distilled water in a suitable container.
Add # of ammonium acetate to the solution
Add distilled water until the volume is 1 L.
Sterilize the solution by passing it through a 0.22-µm filter. Store the solution in tightly sealed bottles at 4°C or at room temperature. Ammonium acetate decomposes in hot H2O and solutions containing it should not be autoclaved.