Peptides MEX / Glossary
Area under the curve: a peak versus an exposure
Identify both plotted variables before interpreting an area.
Updated · Sources and editorial standards
Integrating a chromatographic signal
In chromatography, area integrates detector response across a peak. Area differs from height: a wider peak can have greater area without being taller. Quantification requires a defined relationship between signal and amount.
Sources: [1]
AUC depends on the axes
A signal-versus-time chromatogram describes a separation. A pharmacokinetic concentration-versus-time curve describes exposure. Although both areas are calculated by integration, they represent different properties. Record axes and units before comparing values.
Questions about this reference
Does 99% area mean 99% of the mass?
Not automatically. A signal percentage depends on the detector, integration and component responses.
Sources and original reading
- Shimadzu: Overview of HPLC
- FDA: Bioavailability Studies Submitted in NDAs or INDs — General Considerations
- NIST archived RM 8327 report: UV area purity and peptide mass purity
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