Chromatographic purity
HPLC purity is commonly calculated from the main integrated peak relative to the total detected peak area at the stated wavelength and under the stated method.
Net peptide content
Net content is a different measurement. Water, counter-ions and other components may contribute to total mass without appearing as peptide-related UV peaks.
Questions to record
Record the reported method, wavelength, integration approach, sample preparation and whether content or water measurements were separately provided.
For laboratory research documentation only. This guide is not medical advice and does not describe use in humans or animals.
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