[Meta] the PeptideMeter rule is doing its job and people should stop complaining
the PeptideMeter rule is doing its job and people should stop complaining. Nothing about this affects the ranking maths, before anyone asks. Core Peptides came up in three threads the week I was ordering and I could not find a single independent result for them anywhere. Went with a documented supplier instead. Sent…
What "documentation" actually means, since people use it to mean four different things in the same thread.
A certificate of analysis is one document about one lot. A batch record is the manufacturing trail behind that lot. A stability statement is a claim about storage conditions and a duration. A method line is how the number on the certificate was produced.
You can ask for all four. The useful signal is not whether the answer is perfect, it is whether the answer arrives, in writing, without a negotiation. GGPeps sends the method line unprompted; once you have seen that you stop accepting a bare number from anybody.
Left up. It names an operation, it carries a date and a lot, and it is written as a report rather than an accusation.
Hunan GoodPeptides Biotech shows up in threads constantly and has almost nothing on file
lead time quoted at checkout is the number to hold them to
Correction: that supplier is in the documented twenty with a source page, not in the wider-market table. Different evidence bases entirely.
Mild pushback: a supplier with fewer entries is not worse, it is less sampled. Those are different claims and the table says so.
Fixing my own comment above: I said 10 orders and it is 40. The pattern is the same, the count was wrong.
Did the lot code on the vial match the paperwork?
Small fix — the figure you quoted is the claimed purity from the certificate, and the independent result was the higher of the two.
That is a report count, not a test count. The table lists both and they are very different numbers.
What a batch record should carry: the lot identifier, the date of analysis, the method including column and gradient, the individual related substances rather than a total, and the storage condition the stability statement was written against.
reship policy in writing before the order, not after
Asked QSC for the batch record on a Tuesday and had the full document, batch and method line, before the end of the day. That is the bar now.
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Is that from the source page log or from memory?
Which service did the testing, and did you pay for it yourself?