Journal
Working notes on methodology, logistics, and the small things that separate a clean chromatogram from a misleading one. Written by the Alvar team, published when the bench has something to say — never on a cadence.
A field guide to retention times, area-under-curve, and the small lies a purity percentage can hide.
All entries
Data-logger traces from forty-two shipments, and why room-temperature delivery is a dealbreaker for peptides with disulfide bridges.
UV-area, mass-balance, and AAA tell three different stories. How we reconcile them before declaring a purity number.
The physics of freeze-drying, the cakes that come out right, and the collapse patterns that signal an over-warmed shelf.
EU, UK, and US labeling guidance converges on most points and diverges on the interesting ones. A practical crib sheet.
The salt form affects dosing math, solubility, and stability. When acetate goes above 15%, the downstream errors compound fast.
The short version: a supplier that makes you ask for the chromatogram doesn't want you reading it.
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New entries arrive when the bench has something to say. No cadence, no newsletter padding.