Three ownership models hide behind the words “OEM” and “private label”
A 2 mL clear glass vial from two suppliers, both 12 × 32 mm, both with a 9 mm neck, both certified to the same dimensional drawing, ran side by side on the same autosampler vial tray. Peak area RSD for the internal standard was 0.4% on one lot and 1.9% on the other across 60 injections. Nothing in the paperwork explained the gap. The difference was that one of those vials was made on a mold owned by the brand on the label, and the other was made on a mold owned by the factory that also sell...
