Chromatographic purity
3 standards in the chromatographic purity category.
Standards
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Applies to synthetic peptides of 3 to 60 amino-acid residues supplied as lyophilised powders or solutions, including acylated analogues. Does not apply to recombinant glycoproteins, antibody conjugates, undefined extracts, or non-peptide…
01 Oct 2023 -
Applies to synthetic peptides where the impurity profile is to be characterised rather than merely quantified in aggregate. Covers the isobaric impurity classes that CEI-MS-01 and CEI-MS-02 cannot detect: enantiomeric substitutions…
19 Aug 2024 -
Applies to peptides below approximately 800 daltons, to peptides with a net negative charge and minimal hydrophobic surface, and to any peptide whose main peak elutes with a retention factor below 1.0 under CEI-MS-01. This class includes…
20 Dec 2025