Definition
The measured amount of target peptide in the sample as submitted, determined against a calibrated reference standard and expressed on a stated basis. It is requested rather than run by default, and it depends on a suitable reference standard being obtainable.
Content is not purity. A vial can be 99% pure and hold a third of its labelled milligrams, because purity describes the composition of what is there and content describes how much of it there is.
Related terms
About quantitation and content
How much is actually there, on what basis, and against what standard.
Counter-ionResidual moistureReference standardCalibration curveLinearityWorking rangeRecoveryLimit of detectionLimit of quantitationReporting limitMeasurement uncertaintyMatrix effect