Research notes, batch by batch.
Handling, storage, testing methods, and what a public batch record actually means - written for the people who read the COA.
Peptides sold as reference material live or die on their documentation, so most of what we publish here is practical rather than promotional: how a certificate of analysis is actually produced, why reversed-phase HPLC purity and mass-spectrometry identity answer two different questions, how to store lyophilized material so it survives to the bench, and what changes - and what stays the same - when an independent laboratory re-tests a batch we have already released. There is no dosing advice, no protocols, and no health claims anywhere in the journal; every note is written for research use only, and the science is kept close enough to the underlying data that you can check it against the batch record it refers to.
HPLC vs. Mass Spectrometry: What Purity and Identity Data Mean
Purity and identity answer two different questions. Here is how HPLC and mass spectrometry each contribute to a complete quality picture.
Read more →Storing Lyophilized Peptides: Cold Chain and Reconstitution Basics
Lyophilized peptides are stable, but not indestructible. A short primer on temperature, light, and reconstitution for research handling.
Read more →How to Read a Peptide Certificate of Analysis (COA)
A COA is only useful if you can read it. Here is what each section of a peptide certificate of analysis actually tells you about identity, purity, and handling.
Read more →