Library

Research Library

Reference material on peptide chemistry, the analytical methods behind documentation, and how to read what a record says.

Fundamentals

5 min read

The structural definition of a peptide, how the chains are assembled, and how chain length separates a peptide from a protein.

Analysis

6 min read

What an HPLC purity percentage measures, what it leaves out, and how it differs from net peptide content.

Methods

6 min read

How high-performance liquid chromatography separates a sample, how to read the chromatogram it produces, and the limits of what it can establish.

Methods

6 min read

How a mass spectrometer measures molecular mass, why a matching mass supports an identity conclusion, and what the measurement cannot resolve.

Documentation

4 min read

A lot number links a physical container to the records that describe it. Without one, documentation cannot be checked against the container.

Documentation

6 min read

What each section of a certificate of analysis is asserting, and how to tell a document that reports measurements from one that reports adjectives.

These articles explain research concepts and analytical methods only. Nothing in them is medical advice.

Look up a lot.

Enter the lot number from a vial's label to see its documentation record, if we have published one.