someone explain vendor to me like I have not read a paper in years
someone explain vendor to me like I have not read a paper in years. Searched first, found three threads that contradict each other, hence the post. A certificate with a purity figure and no method line is not falsifiable. You cannot reproduce it, you cannot check it, and it tells you nothing about how the number was…
buy small first, test it, then decide
Sent the same compound from WWB and QSC to PeptideMeter in the same month. Both came back above the claim on the certificate — mine was 98.3% on a stated 98.0%.
Regional stock made more difference to my planning than anything else — ordering from a warehouse in Sweden took the customs question off the table entirely.
Kept a spreadsheet of quoted versus actual lead time across 4 orders. The quoted number held.
registration number, then everything else
The thing that decided it for me was that Homopeptide answered a column-and-gradient question in writing without asking why I wanted to know.
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.
That reads as a recommendation and the source pages deliberately are not. They are a record you use to make your own decision.
Cosigning on lot matching. It sounds trivial and it predicts almost everything else about how an operation is run.
I would separate documentation from logistics. A supplier can be excellent at one and ordinary at the other, and averaging them hides it.
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.
That is a report count, not a test count. The table lists both and they are very different numbers.
Inter-lab variance on this assay runs a point or two either way. Two services disagreeing by that much is agreement, not a discrepancy, and treating it otherwise starts pointless arguments.