What Peptide Purity Percentages Actually Mean: HPLC Area Percent vs Mass Balance Purity
A closer look at the difference between HPLC area percent purity and mass balance purity, and why the distinctio...
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Peptide Identity Testing: How Molecular Weight and Amino Acid Sequence Confirm What You Received
A look at how mass spectrometry and sequence confirmation establish peptide identity, distinct from purity testi...
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Aliquoting Research Peptides: Reducing Freeze-Thaw Cycles and Preserving Sample Integrity
A practical guide to why and how research laboratories divide peptide stock into single-use aliquots to limit fr...
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Peptide Reconstitution in the Research Lab: Solvent Selection, Concentration Calculations, and Documentation
A laboratory-focused guide to how researchers select solvents, calculate concentrations, manage post-dissolution...
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Why Research Peptides Are Supplied Lyophilised: The Science of Freeze-Drying and Stability
An explainer on the science of lyophilisation, why research peptides are freeze-dried, and how the process relat...
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HPLC vs Mass Spectrometry: Verifying Peptide Purity and Identity
HPLC measures how pure a peptide is. Mass spectrometry proves what it is. Here is how each test works, what it c...
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How to Read a Peptide Certificate of Analysis (COA)
A step-by-step guide to reading a research peptide COA: HPLC purity, mass-spec identity, heavy-metals screening,...
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