Certificates of analysis01
How to read a peptide certificate of analysis
Separate purity, identity, quantity, and microbiological evidence before accepting a research lot.
5 min read · Research guideRead guide
Better questions. Better research records.
Look beyond
the purity number.
Understand the report. Spot the missing details. Build a clearer laboratory purchase budget—with practical guides and tools you can use right now.
Free to use · No signup · Your notes stay local
One number isn’t the whole report.Identity. Quantity. Methods. Context.
01 / UNDERSTAND Read the evidence02 / INVESTIGATE Record the unknowns03 / COMPARE Budget the complete cost
Pick the question on your desk
A clearer next step starts here.
Supplier documentation02
Compare peptide suppliers by documentation
Build an evidence table that exposes missing records without inventing a supplier quality ranking.
4 min read · Research guideRead guide
Laboratory budgets03
Calculate the total cost of a laboratory peptide purchase
Compare documented purchasing costs with a transparent example and an explicit quantity basis.
4 min read · Research guideRead guide
Try the document workbench
Turn missing details
into better questions.
Bring your own report. Nothing to upload.
Mark only what you have actually recorded.
Your evidence checklist LOCAL ONLY
Each item starts unrecorded. A check means you recorded the field, not that the material passed a test.
What does a COA actually tell you? ↗Your next conversation
Questions worth asking.
Unrecorded fields: use these questions in your next review.
- Which report covers the exact lot that will ship?
- Can you provide the named methods, issuing laboratory, and report reference?
- What is the testing date, and where can the original report be verified?
- Does the quotation describe gross weight or measured net peptide content?
- Which tests does our laboratory require, and which results are still missing?
- Can you provide shipping, charges, verification costs, and quotation expiry?
View or manually copy your notes
A document checklist, not a quality or safety score. No inputs are sent or stored.
Make the hidden costs visible
A $100 quote.
A different final number.
Shipping, charges, and verification all belong in the same conversation. Use our local calculator to turn your quotation into a complete purchasing budget.
Build your cost estimate ↗Illustrative amount. No supplier price claim.
Clear inputs.Useful answers.
See the methods in motion
A little context goes a long way.
Independent educator videos.
Separate from our supplier research.
ChemComplete · Independent educator
Introduction to HPLC: HPLC Basics
Watch how chromatography separates a mixture and produces peaks. Then use our COA guide to ask what the reported method actually establishes.
Watch at the original source ↗Germán Fernández · Independent educator
Mass Spectrometry: Basic Concepts
Get an introduction to mass-to-charge measurements, then ask which identity evidence is included with your offered lot. Read our sourced guide if you prefer text.
Watch at the original source ↗Clicking play connects to YouTube’s privacy-enhanced player. YouTube then receives request information and applies its own privacy practices. No video-provider request is made before you click. These videos are third-party education, not our product testing.
Keep something useful
Your research deserves a better paper trail.
Take the supplier checklist into your next review. An editable CSV. Yours without an inbox trade.