Laboratory Testing & Quality
Identity, purity, certificates of analysis and analytical method selection.
Laboratory Testing & Quality
4 articles
Laboratory Testing & Quality
How to Read a Peptide Certificate of Analysis
A section-by-section guide to COAs: what each figure means, which claims a certificate can support, and the gaps that most often go unnoticed.
4 min read
Laboratory Testing & Quality
Mass Spectrometry for Peptide Identification
How ESI and MALDI differ, why multiply charged ions appear, what tandem MS adds over intact mass, and the limits of each approach.
2 min read
Laboratory Testing & Quality
Peptide Purity and Identity Testing: Which Method Answers Which Question
RP-HPLC, mass spectrometry, amino-acid analysis and Karl Fischer titration each answer a different question. A guide to choosing and interpreting them.
2 min read
Laboratory Testing & Quality
Peptide Reference Standards: What They Are and Why Identity Work Needs Them
The difference between a reference standard, a working standard and an ordinary sample, and why comparison against a characterised material beats a mass measurement.
2 min read