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Impurity identification and determination for the peptide hormone angiotensin I by liquid chromatography–high-resolution tandem mass spectrometry and the metrological impact on value assignments by amino acid analysis

Peptide Hormone AngiotensinBiological Mass SpectrometryPeptide TherapeuticsBioanalysisAnalytical ChemistryImpurity IdentificationClinical ChemistryProteomicsChromatographyBiochemistryEndocrinologyPharmacologyValue AssignmentsNatural SciencesPhysiologyMass SpectrometryProtein Mass SpectrometryPeptide TherapeuticMedicineDrug Analysis