Three documents. Different jobs.
When reviewing a research material, begin with the product information, the Certificate of Analysis (COA), and the Safety Data Sheet (SDS). Read them together and keep track of the product and lot they describe.
| Document | Use it to review | Check carefully |
|---|---|---|
| Product information | The listed material, quantity, format, and available options. | The exact option you selected. |
| COA | The identified sample, tests performed, and reported results. | Lot number, report issuer, methods, units, and notes. |
| SDS | Hazard and handling information for the material. | The product identifier and document revision. |
Everyday Peptides asks purchasers to review applicable product and lot documentation as part of its research use policy.
One test answers one kind of question.
Start by identifying the question a reported result can answer. A purity result, an identity assessment, and a quantity measurement are different pieces of information.
- Identity: what evidence supports the identity of the tested material?
- Purity: what portion of the measured signal is assigned to the target under the stated method?
- Quantity or content: how much material was measured, in what units, and on what basis?
Analytical HPLC and mass spectrometry are distinct tools in peptide analysis. Their interpretation depends on the methods and the data provided. Thermo Fisher Scientific explains their complementary roles.
For the terminology in more detail, read purity, content, and identity.
Keep claims tied to the actual report.
Use the document for the particular product and lot you are considering. Check the tests listed, rather than assuming that a headline percentage or a general description covers everything you want to know.
Look for the result you need.
If you need information about a particular test, ask for the applicable report. An unlisted test should remain an unanswered question.
A report describes the sample and testing within its scope. Whether that information meets the needs of a particular experiment is a separate assessment for the researcher.
Find the document. Match the lot.
- Open the relevant product in the main store.
- Review the available COA and SDS, along with the selected product option.
- Compare the product and lot identifiers with the report. After receiving an order, check the delivered label as well.
- If anything is missing, unreadable, or inconsistent, contact us with the product name and the identifier you have.
For current documents or a specific question, email info@everydaypeptides.ltd. Please avoid sending payment information or unrelated personal details.