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The Australian Customer’s V947 Autosampler Vial Order is Completed
The Australian Customer’s V947 Autosampler Vial Order is Completed
American Customer Ordered 100,000 Boxes of 9-425 2ml HPLC Vials
American Customer Ordered 100,000 Boxes of 9-425 2ml HPLC Vials
5000-boxes-of-blue-screw-cap-10-425-hplc-vial-sent-to-singapore
5000-boxes-of-blue-screw-cap-10-425-hplc-vial-sent-to-singapore
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Tested values carry a method, nominal values carry a tolerance that may not
Tested values carry a method, nominal values carry a tolerance that may not
April 5, 2018
Tested values carry a method, nominal values carry a tolerance that may not
A purchasing agent forwarded me a datasheet last month for a 9 mm screw-top vial. It listed “Residual volume: < 5 µL" and "Septum resealability: > 50 injections.” Both numbers looked fine on paper. The first value was never tested on that lot. The second was tested on a different septum, from a different production year, against a 26-gauge conical needle at 23 °C. The agent had already placed a PO. Reading an HPLC vial datasheet is not about finding the best numbers. It is about...
The landed cost formula that procurement spreadsheets usually miss
The landed cost formula that procurement spreadsheets usually miss
April 5, 2018
The landed cost formula that procurement spreadsheets usually miss
A purchasing manager at a mid-size environmental testing lab approved a quote for 10,000 9 mm screw-top HPLC vials at $0.32 per unit. Six weeks later, the finance director asked why the landed cost per usable vial came out to $0.51. The difference was not freight. It was a 3.7% autosampler failure rate traced to a septum lot that cored under a 23-gauge needle after the second puncture. That gap between invoice price and usable cost is what this article dissects. If you are running an hplc v...
Glass forming: what the line controls before the vial exists
Glass forming: what the line controls before the vial exists
April 5, 2018
Glass forming: what the line controls before the vial exists
I once traced a 4.7% RSD drift across a 200-vial sequence to a single forming die on cavity 14 of a 40-cavity mold. The part measured 11.97 mm OD at the neck instead of 12.00 mm. The autosampler gripper compensated just enough to mask it for 170 injections, then a needle hit the cap at a 0.3 mm offset and bent. That is what a vial factory actually controls on the line: not the catalog spec, but the 40 or 64 or 96 individual cavities, the three or four molding parameters that drift per cavit...