Start with the material and the lot
A certificate of analysis belongs to a particular material and batch. Begin with the name, identifying details and lot number, and compare them with the product record and container. If those details do not match, a result on the certificate may describe something other than the material you are reviewing. A brand name or a similar product photograph is not enough to establish that connection. [1]
Read across the result
An analytical result becomes more useful when you can see the test method, its acceptance criterion and the reported value together. Identity, quantity, purity and impurities answer different questions. A single percentage cannot describe every relevant attribute of a sample. Check what was actually measured and whether the method is appropriate to the question your laboratory needs to answer. [2]
Distinguish a specification from an observation
The specification describes an agreed requirement; the result describes what a test reported. Read both. A value inside an acceptance range only supports the attribute covered by that test. It does not automatically establish other properties, such as sterility, or the suitability of a material for a different setting. The reference guidance linked here concerns pharmaceutical quality systems; it is background reading, not a claim that Peptellect products meet those systems. [2]
Keep the source accessible
Retain the original certificate with the product and lot record, including its date and issuing laboratory. If a name, method or result is unclear, ask for clarification before making an inference. A screenshot of a number can lose the conditions and identifiers that make the result interpretable. A publication about the compound serves a different purpose and cannot stand in for a batch certificate. [1]
What you will find on each product page
Each Peptellect product gallery shows the batch certificate of analysis beside the product image, with the batch number, the issuing laboratory, the report number and the results it reported. Open it full size to read the chromatogram and methods, and match the lot on your vial to the certificate. Where a batch certificate has not yet been released, the gallery says so with a clearly labelled placeholder rather than an invented result.
Sources & further reading
- FDA: information to include in an API certificate of analysis
- ICH Q6B: test procedures and acceptance criteria
For research education only. This article does not provide instructions for human or veterinary use.