Research library
Analytical method, quality control and sourcing. These articles cover how research peptides are actually characterised — what HPLC and mass spectrometry each establish, which numbers on a Certificate of Analysis mean something, and which are routinely invented. No dosing or administration guidance is published here.
- ·9 min read
Choosing a Research Peptide Supplier in Australia: A Checklist
Fourteen questions that separate suppliers with a real quality process from suppliers with a good website — covering documentation, testing claims, provenance, handling and the language they use.
sourcingAustraliaCOAquality control - ·8 min read
Counterfeit and Substituted Research Peptides: What Actually Gets Faked
Substitution, dilution, wrong-form supply and underfilled vials — the four ways research peptides are misrepresented, why each is hard to detect, and which analytical test catches which.
counterfeitsourcingquality controlAustralia - ·8 min read
Research Peptides in Australia: The Regulatory Position
How the TGA, the Poisons Standard and import rules apply to peptides supplied for laboratory research in Australia — what research-use-only means legally, and where the line sits.
AustraliaTGAregulationcompliance - ·8 min read
Why Peptide Solutions Go Cloudy: Aggregation and Handling
Shaking a reconstituted peptide is the most common way to ruin one. The interfacial mechanism behind aggregation, why lipidated peptides are worse, and the handling practice that follows from it.
reconstitutionaggregationhandlingstorage - ·8 min read
Water Content and Lyophilisation Quality: Reading the Cake
The freeze-dried cake is a quality record you can read without an instrument. What collapse, shrinkage and discolouration indicate, why residual water matters, and how Karl Fischer titration fits in.
lyophilisationstorageKarl Fischerstability - ·8 min read
Endotoxin and Sterility Testing: The Analyses a Peptide COA Doesn't Cover
Purity and identity say nothing about bacterial endotoxin or sterility. What the LAL assay measures, why endotoxin survives sterilisation, and when these tests are relevant to in-vitro work.
endotoxinsterilityLALcell culture - ·8 min read
What "Third-Party Tested" Actually Means
The phrase appears on nearly every research peptide website and means almost nothing without three specifics. What independent verification involves, what it costs, and why "every batch" claims are usually false.
third-party testingCOAsourcingquality control - ·9 min read
Reading an HPLC Chromatogram: What the Trace Shows That the Percentage Doesn't
A purity figure is one number extracted from a picture. How to read the picture — baseline, peak shape, resolution, where the impurities sit, and what an integration boundary can hide.
HPLCchromatographyquality controlCOA - ·9 min read
How to Spot a Fabricated Certificate of Analysis
Forged peptide COAs are common and most of them share the same handful of tells. What fabricated documents get wrong about chromatograms, mass spectra, batch numbers and the language of a real laboratory report.
COAfraudquality controlsourcing - ·8 min read
What Mass Spectrometry Establishes That HPLC Cannot
Purity and identity are different questions requiring different instruments. Why a chromatogram alone cannot tell you which peptide is in the vial, and what a mass spectrum on a COA should actually show.
mass spectrometryidentityCOAquality control - ·8 min read
Net Peptide Content vs Purity: The Two Numbers Everyone Confuses
A vial can be 99% pure and still contain 25% less peptide than the label says. Why purity and net peptide content are different measurements, and which one your concentration calculation actually needs.
COAnet peptide contentTFAconcentration - ·9 min read
How to Read a Peptide Certificate of Analysis
A field-by-field walkthrough of a peptide COA — what each number establishes, which fields are load-bearing, and what a missing batch number tells you about the rest of the document.
COAHPLCmass spectrometryquality control