Independent analytical testing. Results apply only to the sample received, for research use only.

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Working range

Seen on method statements.

Definition

The concentration span over which the method has been shown to perform acceptably. Results are only reported inside it.

Related terms

Calibration curve
The relationship between analyte concentration and detector response, built from standards across a working range.
Limit of quantitation
The lowest amount that can be measured with acceptable precision and accuracy.

About quantitation and content

How much is actually there, on what basis, and against what standard.

Peptide contentLabel claimPeptide base versus gross saltCounter-ionResidual moistureReference standardLinearityRecoveryLimit of detectionReporting limitMeasurement uncertaintyMatrix effect

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