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Document set current to 30 July 2026
Defined term · Analytical chemistry

Peptide content

The mass fraction of a lyophilisate that is peptide, the remainder being water, counter-ion and residual solvent. Determined by amino-acid analysis or nitrogen determination. Distinct from purity…

Document identifier
CEI-GT-136
Series
Defined term
Version
1.0
Published
30 Jul 2026
Last reviewed
30 Jul 2026
Certainty
Not rated

§1Peptide content

§1.1Also known as

Peptide assay

§1.2Category

Analytical chemistry — Terms describing the determination of identity, purity, content and quality.

§1.3Related terms

  • Chromatographic purity — The area of the main peak as a percentage of total integrated area under stated conditions. A relative measure that assumes comparable molar absorptivity across species…
  • Mass balance — The sum of peptide content, water content and counter-ion content, which should approach one hundred per cent. A certificate that does not permit a mass balance to be…
Compound Evidence Institute · CEI-GT-136 · https://compoundevidence.com/glossary/peptide-content/ · retrieved 30 July 2026
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