PeptideMeter — what its reports establish

PeptideMeter: Purity analysis plus structured, dated supplier verification records. What a report from this service does and does not establish, and how we cite it.

Scope

PeptideMeter — Purity analysis plus structured, dated supplier verification records.

This page describes how this community reads and cites reports from this service. It is not an assessment of the service and we have no relationship with any of the four we cite.

What a report contains

PeptideMeter produces both individual analytical results and structured supplier verification records. The second of those is a different kind of artefact from a purity report: it is an assessment maintained over time rather than a measurement at a point in time.

We cite both, and we keep them distinct on our vendor pages. A verification record is evidence about a supplier's practices. A purity result is evidence about a vial. Conflating them is the most common error in how these services get quoted.

How we cite it

On a vendor documentation page, an entry citing this service records: the compound, the lot identifier, the date, the method as reported, the result, and the state — verified, unverified or disputed. An entry missing any of those is incomplete and gets moved to the discussion rather than the record.

"Unverified" means the available material did not contain enough to check. It is not a negative finding about a product, and we use that wording deliberately.

Limits

One service, one laboratory, one vial, one date. Agreement between two independent services on the same lot is a much stronger statement than a single high number, and our records mix services for exactly that reason.

None of these services can tell you whether something is safe to use. That is a different question and it is not an analytical one.