AssayIndex
Content & mass

Amino-acid analysis (AAA)

Acid hydrolysis followed by chromatographic quantification of the liberated residues. The reference method for peptide content where no standard of the intact peptide exists.

Related terms

Peptide content
The fraction of total mass that is peptide, %w/w. Distinct from purity, which is a fraction of detected chromatographic area.
Reference standard
A material of known content used to quantify an analyte. Absent for most research peptides, which is why content is rarely measured.

Where this term appears

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