What ≥ 99% HPLC purity actually measures — and what it doesn’t

A single percentage on a certificate hides column choice, wavelength, gradient and integration. Here is how we standardize the number across every Axova lot.

Cold-chain dispatch: keeping lyophilized peptides intact from vial fill to bench

Temperature excursions during transit are the silent contributor to failed reconstitutions. Our 48-hour envelope, monitored per shipment.

Reading a MALDI-TOF report: mass tolerance, isotope envelopes and adduct peaks

How our lab distinguishes a legitimate ±0.5 Da drift from a genuine identity failure — and why we archive the raw spectrum for every batch.

Reconstitution and storage: bacteriostatic water, aliquoting, and freeze-thaw cycles

A working reference for laboratory technicians handling lyophilized reference peptides intended for in-vitro studies only.

Batch traceability from raw amino acid to sealed vial

Every Axova vial carries an etched batch identifier. Here is what that identifier resolves to inside our internal chain-of-custody system.

Endotoxin thresholds: why we hold to < 5 EU/mg on every release

The pharmacopoeial ceiling is generous. Our internal release limit is stricter — and here is the LAL workflow that gets us there consistently.