AssayIndex
Content & mass

Residual moisture

Water remaining in a lyophilised cake. 1–4 % in well-dried material; 8–13 % for hygroscopic short peptides.

Related terms

Karl Fischer titration
Stoichiometric determination of water by reaction with iodine and sulfur dioxide. The reference method for residual moisture in lyophilised material.
Lyophilisation
Freeze-drying: freezing the solution then subliming the ice under vacuum. Cake structure and residual moisture are the observable outputs.

Where this term appears

The glossary exists to make record pages readable without a chemistry degree. Every technical term on a report resolves here.