Methods used to confirm identity, purity and lot consistency of Selank reference material.
Appearance
A Selank reference lot is typically a white to off-white lyophilized solid. Routine checks include inspecting appearance and confirming clean reconstitution in an appropriate analytical solvent, ensuring suitability for chromatographic and spectrometric measurement.
RP-HPLC purity
Reverse-phase HPLC provides the purity figure, generally not less than 98%. A water-and-organic gradient with an ion-pairing additive resolves the main peak from related impurities, and the integrated chromatogram supports the value on the certificate of analysis.
Mass-spectrometric identity
Identity is confirmed by mass spectrometry, matching the observed mass against the value near 751.9 g/mol expected for the peptide. The method can also surface common synthesis-related impurities such as oxidation or deletion sequences.
Lot control
Each lot is documented with analytical results so researchers can verify batch-to-batch consistency. Retaining this documentation with experimental records supports traceability and reproducibility for neuropeptide benchwork using the standard.