Definition
The ion paired with a charged peptide in its salt form, commonly acetate or trifluoroacetate. It contributes real mass to the powder in the vial while contributing no peptide, and its share is proportionally larger on short peptides.
Related terms
About quantitation and content
How much is actually there, on what basis, and against what standard.
Peptide contentLabel claimReference standardCalibration curveLinearityWorking rangeRecoveryLimit of detectionLimit of quantitationReporting limitMeasurement uncertaintyMatrix effect