Analytical evidence review

What do published analytical surveys report about the identity, purity and content of peptides obtained from unregulated suppliers?

What is known about bacterial endotoxin content in peptides supplied for research and injected in practice?

What proportion of certificates of analysis supplied with research peptides contain the fields required to interpret the reported purity figure?

How large is the discrepancy between labelled peptide mass and delivered peptide mass when counter-ion and water content are not reported?

How much does a reported chromatographic purity figure vary with the method used to obtain it?

What in-use period can be supported for a reconstituted research peptide solution?

What is the effect of reconstitution practice on the dose actually delivered from a lyophilised research peptide?