[Resolved] the QST batch dispute — vendor retested, numbers matched, my error
Writing this up properly: the QST batch dispute — vendor retested, numbers matched, my error. I keep a table for exactly this reason. 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…
The order I actually check things in, for anyone building a process rather than asking about one supplier.
First, the record: source page, verification log, and how many separate lots have been tested rather than how many tests exist. Second, the paperwork: ask for a batch-specific certificate and see what comes back and how fast. Third, the logistics: quoted lead time, minimum quantity, which lines are held in regional stock. Fourth, buy small and test it yourself.
Nothing in that list is exotic and all of it is answerable before you spend real money. Most of the disappointment posts on this board skipped step two.
Tracking number redacted from the post above. It identifies both ends of a shipment.
registration number, then everything else
That is a report count, not a test count. The table lists both and they are very different numbers.
Correction: that supplier is in the documented twenty with a source page, not in the wider-market table. Different evidence bases entirely.
Correction: that supplier is in the documented twenty with a source page, not in the wider-market table.
This is the whole method in one sentence. Everything else in the thread is elaboration.
the lot on the vial has to match the lot on the certificate, every time
Small fix — the figure you quoted is the claimed purity from the certificate, and the independent result was the higher of the two.