HPLC and UPLC: what changes in an analytical comparison?
Compare complete separation systems by their demonstrated resolution and dispersion rather than treating a platform label as a purity grade.
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LC-MS and MALDI-MS for peptide characterisation
Compare complete electrospray and MALDI workflows, distinguishing complementary peptide detection from proof that one platform is universally superior.
Read the article →Intact mass and tandem MS: different levels of identity evidence
Decide when an intact-mass result needs local sequence evidence and how fragment data can resolve a question without proving every structural feature.
Read the article →Amino acid analysis and quantitative NMR for content
Choose a content-assignment approach by its assumptions, impurity corrections and calibration evidence, rather than by a universal method ranking.
Read the article →Karl Fischer and near-infrared moisture measurements: testing transferability
Understand when a near-infrared model calibrated against Karl Fischer results can be applied to a different freeze-dried material.
Read the article →ICP-MS and ICP-OES for elemental analysis
Compare elemental methods against the required concentration, sample matrix and validation evidence rather than the instrument name.
Read the article →NMR and circular dichroism for peptide structure
Choose structural evidence by the question being asked: an overall conformational change, a local motif or a supported structural model.
Read the article →Size-exclusion chromatography and dynamic light scattering
Interpret differences between separation-based assembly measurements and light-scattering results without turning either into a universal aggregate count.
Read the article →LAL and recombinant endotoxin tests
Read comparative endotoxin studies by their samples, controls and performance measures rather than assuming every assay format is interchangeable.
Read the article →Thymosin beta-4 and profilin: contrasting actin-binding partners
Understand why two proteins that bind actin monomers can have different effects on nucleotide exchange and filament assembly.
Read the article →GHK and GHK-Cu: ligand versus copper complex
Compare the peptide ligand with its copper complex while keeping solution conditions and experimental comparators explicit.
Read the article →Epithalon and Epithalamin: why a potency ratio needs an endpoint
Check the materials, measured response and comparison behind claims that a defined tetrapeptide is a fixed number of times stronger than a pineal preparation.
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