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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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What coring actually is, mechanically
What coring actually is, mechanically
April 5, 2018
What coring actually is, mechanically
I still remember the Monday morning when a routine batch of 96 samples came back with a needle pressure error on the third injection. The autosampler had been running the same method for six months. Nothing changed on the LC side. What changed was the vial lot. We had switched to a lower-cost 9 mm screw-thread vial with a thin silicone septum, and by the time we pulled the needle, the tip was curled like a fishhook and the septum had a clean 0.8 mm plug punched straight through it. That plu...
Why the autosampler, not the vial catalog, should drive the spec
Why the autosampler, not the vial catalog, should drive the spec
April 5, 2018
Why the autosampler, not the vial catalog, should drive the spec
I have watched a lab burn three weeks of instrument time because someone ordered the wrong vial. The autosampler was a newer model with a 6 mm stroke, the vials were 12 x 32 mm with a 1 mm wall, and the needle was bottoming out on glass instead of reaching the 150 µL the method called for. The chromatograms looked fine. The recoveries were 20% low. Nobody noticed until an audit. That is the thing about vial dimensions: they are boring right up until they quietly ruin your data. This guide i...
Why hplc vial failures are usually a systems problem
Why hplc vial failures are usually a systems problem
April 5, 2018
Why hplc vial failures are usually a systems problem
I have watched a lot of good chromatography go bad because of a 32 x 11.6 mm piece of glass. After fifteen years running a consumables operation, I keep a running list of the vial failures that show up in customer labs week after week. Most of them are not mystery problems. They are predictable, repeatable, and traceable to a handful of root causes: the wrong septa, the wrong crimp, the wrong cap torque, or a vial that was never designed for the autosampler it sits in. This article is the f...