Quality Control of Peptide Drugs. Chiral Amino Acid Analysis versus
Standard for Icatibant Acetate
Key Words: chiral amino acid analysis, HOE 140, quality control, peptide drug, validation
Summary
A method of chiral amino acid analysis versus standard is presented.
By treating the peptide sample and a chiral standard whose
intrinsic chiral composition is known in the same way, i.e. simultaneous
hydrolysation and analysis, exact corrections can be made
for the sequence-related and many hydrolysation-related racemisations.
The accuracy obtained in this way permits use of the results
for quality control of the chiral purity of peptide drugs. Using the
bradykinin antagonist Icatibant acetate (INNM) the method was
validated with respect to its precision, accuracy, specificity, limit
of detection. and robustness.