01 · Documentation 9 min read
How to Read a Peptide COA
Learn how to review a peptide certificate of analysis: lot identity, methods, specifications, results, chromatograms, traceability, and common red flags.
Read the guide
Research education for qualified laboratory use
Phase One research library
Peptide research, testing, and documentation guides
Build better laboratory records by understanding what analytical documents actually say. These guides connect COAs, chromatograms, batch identity, LC-MS evidence, purity and content language, microbiological test scope, material form, and storage controls without extending the evidence beyond its scope.
Educational library
Follow the evidence chain
Start with COA fundamentals, move into analytical methods, then connect purity, identity, content, microbiological scope, batch, and storage records. Each guide links to the next useful question.
02 · Documentation 8 min read
What Is a Certificate of Analysis?
Understand what a Certificate of Analysis records, how it differs from a specification or safety sheet, and why batch identity and method context matter.
Read the guide 03 · Testing 10 min read
HPLC Peptide Testing Explained
A laboratory guide to HPLC peptide testing, chromatograms, peak-area purity, method variables, system suitability, and complementary identity testing.
Read the guide 04 · Testing 10 min read
Peptide Purity Testing: Methods and Limits
Understand peptide purity testing across chromatographic purity, identity, assay, water, residuals, reference standards, sampling, and uncertainty.
Read the guide 05 · Testing 8 min read
What Does 99% Peptide Purity Mean?
Learn what a 99% peptide purity result may mean, why the analytical method and calculation matter, and which conclusions the number cannot support.
Read the guide 06 · Handling 9 min read
Lyophilized Research Peptides: A Laboratory Guide
A research-only guide to lyophilized peptides: freeze-drying stages, cake appearance, moisture risks, container integrity, documentation, and storage evidence.
Read the guide 07 · Quality systems 10 min read
Peptide Batch Testing and Documentation
Learn how peptide batch testing connects lot identity, sampling, test panels, validated methods, acceptance criteria, data review, and COA records.
Read the guide 08 · Handling 9 min read
Laboratory Peptide Storage: Documentation and Controls
A laboratory-only guide to peptide storage controls, receiving records, temperature monitoring, light and moisture risks, excursions, and traceability.
Read the guide 09 · Analytical methods 10 min read
LC-MS Identity Testing for Research Peptides
Learn what LC-MS peptide identity testing measures, how to read expected and observed mass, and why identity, purity, and sequence evidence are distinct.
Read the guide 10 · Analytical methods 10 min read
Endotoxin, Microbial, and Sterility Testing
Understand why endotoxin, microbial enumeration, and sterility tests answer different questions and how to read their scope on a batch COA.
Read the guide 11 · Analytical methods 9 min read
Peptide Purity vs Identity vs Content
Compare peptide purity, identity, and content, learn which analytical questions they answer, and avoid treating an HPLC area percentage as total vial content.
Read the guideA narrower claim is a stronger claim
A COA records the tests and results stated for an identified sample or batch. An HPLC percentage describes detector response under a defined method. A storage statement should rest on material-specific evidence. Keeping those boundaries visible prevents a useful measurement from becoming an unsupported guarantee.
The official ICH, FDA, NIST, and public USP resources linked inside these guides provide analytical context. They do not certify Phase One Labz products, establish regulatory approval, or replace a qualified laboratory’s procedures.