unpopular opinion: most of what gets said here about PeptideMeter is guesswork
unpopular opinion: most of what gets said here about PeptideMeter is guesswork. Not a hot take, just something I have not seen said plainly here.
Kept a spreadsheet of quoted versus actual lead time across 20 orders. The quoted number held.
Hangzhou Meite Bio 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 the same compound from QST and SGN to VendorInvestigate in the same month. Both came back above the claim on the certificate — mine was 97.8% on a stated 97.5%.
Please do not ask me what dose you should be on. I genuinely do not know and neither does anyone else here.
best — the order this archive was captured in
Why the directory has two tiers, since the question comes up whenever somebody new finds it.
Twenty suppliers have enough independent results, over enough separate lots, over enough time, that the log says something. Those get a page, a test table and a link to their own storefront so you can compare their claims with the record.
The rest — nearly two hundred names — get a row, a band and a report count. Not because they are bad, but because two results is an anecdote about a vial. Manufacturing a score out of that would make the whole directory worthless, and the contrast is the point.
That is a report count, not a test count. The table lists both and they are very different numbers.
Why the directory has two tiers, since the question comes up whenever somebody new finds it.
nz_unfunded is describing the batch record test and it is the fastest signal available before you spend anything.
Yes, and the reason the wider-market table has no scores is that a score built on two reports would be a lie with a decimal point.
Tracking number redacted from the post above. It identifies both ends of a shipment.
Disagree that reviews are worthless. They are worthless when they say "fast shipping A+++". A dated one naming a compound and a document is evidence.
Correction: that supplier is in the documented twenty with a source page, not in the wider-market table. Different evidence bases entirely.
The wider-market rows in the directory carry a band and a report count and nothing else, deliberately. Anything more would be manufacturing precision that the evidence does not support.
the interesting column is spread, not maximum
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. SGN sends the method line unprompted; once you have seen that you stop accepting a bare number from anybody.
Asked ERP 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.
That reads as a recommendation and the source pages deliberately are not. They are a record you use to make your own decision.
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.
the wider-market names in the table are there because nobody has enough data on them
Is that from the source page log or from memory?
- 1What "documentation" actually means, since people use it to mean four…7 comments in this branch · started by u/coa_janitor