A laboratory report is most useful when you can identify the sample, understand the measurements and check the original document. A logo, a percentage or a photograph by itself does not answer all three questions. Use this checklist when reviewing research-product documentation.
1. Identify the document and sample
Look for the laboratory name, report or task number, issue date and sample description. Record the product name, supplier and batch or lot identifier exactly as shown. Keep the sample identifier separate from the laboratory’s report number: they serve different purposes.
If the report names no batch, do not fill that gap by assuming it covers the batch currently available. Matching a product name is a starting point; it does not establish that two samples came from the same lot.
2. Read the measurement labels and units
Check which tests were actually performed and what each result measures. Identity, purity and measured quantity answer different questions. A result expressed as a percentage is not automatically a measured amount in milligrams, and a labelled amount is not itself a laboratory finding.
Read any method notes, uncertainty, detection limits and qualifications included by the laboratory. If a field or test is absent, record it as unspecified rather than treating it as a pass. For unit terminology, see our guide to product-label amounts and units.
3. Check the original source
When the issuing laboratory provides a verification page or original report, compare its report number, date, sample description and results with the copy you were given. Use the laboratory’s own website or contact information to investigate discrepancies. A supplier’s reproduced image and a laboratory-controlled verification record are different sources.
Successful document verification shows that the record matches the laboratory’s copy. It does not, by itself, prove the history of every other package carrying a similar label.
4. Keep conclusions within the report’s scope
Avoid extending results to a different batch, supplier or product presentation without supporting records. Do not infer sterility, clinical effectiveness or suitability for human use from an unrelated analytical result. Read the stated purpose and limitations of the actual document.
NIST’s measurement guidance emphasizes that results apply to the specific instrument or standard tested unless otherwise stated. This checklist applies that sample-specific principle to reviewing catalogue documentation; it is not a certification of any Peptide Marketplace product.
Questions to send with a documentation request
- Which product, supplier and batch does this report describe?
- Is an original document or laboratory verification link available?
- What was measured, when was it measured, and what remains unspecified?
- What evidence connects the tested sample to the batch being discussed?
Use Contact Us with the product and lab name for a listing-specific question. Availability of current batch documentation must be confirmed for that listing.
Source and related reading
NIST: Metrological Traceability — Frequently Asked Questions and Policy. NIST provides the measurement guidance cited here; it does not endorse this website or its catalogue.