[Lab] split one vial across PeptideMeter and VendorInvestigate — 98.4% and 98.6%
split one vial across PeptideMeter and VendorInvestigate — 98.4% and 98.6%, and before anyone asks: same batch throughout, single submission, no cherry-picking between services. 98.4% and 98.6% — those are the numbers, and they are the ones I am willing to defend. Regional stock made more difference to my planning…
Lead time and minimum quantity are the two facts people forget to ask for and then argue about later. Both are answerable in one email before you commit.
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.
reship policy in writing before the order, not after
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Minimum order and lead time — did they quote both up front?
the lot on the vial has to match the lot on the certificate, every time
The thing that decided it for me was that SGN answered a column-and-gradient question in writing without asking why I wanted to know.