Method for preparing ten millimoles of ammonium acetate
To make ten millimoles (10 mM) of ammonium acetate, prepare a clean device first, and the measuring device must be accurate. Take an appropriate amount of water and place it in a clean container. The amount of water is calculated according to the total amount of solution required.

Measure the ammonium acetate solid and accurately weigh the appropriate amount of ammonium acetate according to stoichiometry. When weighing, calibrate the balance and operate carefully to prevent errors.

Slowly pour the weighed ammonium acetate solid into a container filled with water, and gently stir it with a glass rod to help it dissolve. Stir slowly to avoid splashing the solution.

When the ammonium acetate solid is completely dissolved, or has an undissolved state, it can be heated slightly, but the temperature should not be too high to prevent the decomposition of ammonium acetate. At the same time of heating, continue to stir to promote its instant dissolution.

When the solution is completely dissolved and cooled to room temperature, use a volumetric bottle bandwidth evaluation to the required volume. On the occasion of bandwidth evaluation, look at the scale head-up, so that the concave liquid level of the solution is tangent to the scale.

After bandwidth evaluation, close the cork tightly, and repeatedly reverse it to make the solution mix evenly. In this way, the preparation of ten millimolar ammonium acetate solution is completed.

The preparation process requires strict adherence to the operating specifications to ensure accuracy, and the resulting solution can be applied to subsequent experiments.