Portal:Analytical chemistry

Almost every quality dispute in this field reduces to a question about an analytical result: what was measured, against what standard, by what method, and what the number is relative to. This portal covers separation science, mass spectrometry, the compendial water and endotoxin tests, and the validation framework that decides whether a method is fit for the claim being made from it.

The single most useful idea here is the distinction between area percent purity and peptide content: the first is a ratio among the species that eluted, the second is a mass fraction of the vial.

• Source the interference claims in the water-determination articles individually.
• Add a worked limit-of-detection calculation with real signal-to-noise figures.
• Reconcile the peak-purity terminology used across the chromatography articles.

Items here are deliberately small enough to finish in one sitting. See Project:Verifiability before adding sources.