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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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Start with consumption in vials per working day, not vials per month
Start with consumption in vials per working day, not vials per month
April 5, 2018
Start with consumption in vials per working day, not vials per month
A buyer I work with runs 340 injections a day across two Aijiren autosamplers, and last March her line went down for nine days because a 9 mm screw-thread vial order sat on a water in Guangzhou. The reorder point on her spreadsheet was 4,000 vials. She had 4,200 on hand the morning the stockout started. That number was built on a 21-day average lead time, and the actual shipment took 34 days. The gap between a reorder point and a stockout is not the average lead time. It is the lead-ti...
Why a drawing tolerance and a process capability are not the same number
Why a drawing tolerance and a process capability are not the same number
April 5, 2018
Why a drawing tolerance and a process capability are not the same number
A customer sent back a lot of 500 vials last March because their autosampler kept throwing “vial not found” errors on roughly 3% of the tray. The vials met every dimension on the drawing. What they did not meet was the dimensional tolerance capability the process needed: the crimp shoulder sat at 12.41 mm instead of the nominal 12.35 mm, and the 0.06 mm drift was enough to lift the vial out of the gripper’s reach on one out of every thirty-three positions. The drawing said...
SW-846 does not name “HPLC vial” but 8000C and the method-specific chapters
SW-846 does not name “HPLC vial” but 8000C and the method-specific chapters
April 5, 2018
SW-846 does not name “HPLC vial” but 8000C and the method-specific chapters
A 24-sample semivolatiles run just failed its continuing calibration verification because the internal standard response in vial 7 dropped 41% from vial 1. The method was EPA 8270E. The instrument checked out, the column was fine, and the standard was fresh. The problem was the vial: a lot of 9 mm screw caps with PTFE/silicone septa that had been autoclaved once too often and then torqued to 18 in-lbs by a new technician. The septa had compressed unevenly, the vial leaked during the 12-hour...