how many independent tests before you trust a vendor. my number is three
Trying to get a straight answer on this: how many independent tests before you trust a vendor. my number is three. 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. Lead time and…
This. Ask for the batch record. The ones who send it inside a day have told you more than any review could.
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.
Yes. Spread across lots is the number that tells you about the process. A single high result tells you about a vial.
the source page log is more useful than the score above it
Six orders across two years from KP. Same packaging, same paperwork, same lead time. The most boring supplier relationship I have and I mean that as praise.
Where a supplier holds regional stock, ask which lines are actually held there rather than drop-shipped. It changes the lead time and it changes the customs question.