Laboratory notes

Notes from the bench

Insights from our lab on testing methods, certificates of analysis, and the science behind independent verification.

Latest note

Chemical Fingerprints: How Laboratories Identify an Unknown Substance

Laboratories rarely identify an unknown substance with a single test. HPLC, GC-MS, LC-MS, and NMR each supply different evidence, and a reliable result depends on combining them.

By Arthur van der Meer, MSc27 September 20268 min read

Earlier notes

14 September 20264 min read

What Is a Certificate of Analysis (CoA) and How Can You Verify It?

earn what a Certificate of Analysis (CoA) really tells you, how to verify its authenticity, and why document verification alone may not be enough to confirm the quality and identity of a material.Read article 14 September 20265 min read

Beyond Detection: Key Strategies for Peptide Separation and Analysis

Discover how peptides are detected and analyzed, from chromatographic separation to mass spectrometry, and why combining analytical techniques can provide a more complete picture of peptide identity and purityRead article