Chinese
Chromatograhy Vials
We have our own factory which covers about 13,000 square meters,and we have the professional engineer and specific workers.
ABOUT Aijiren
Zhejiang Aijiren Technology, Inc. is a global supplier of life-science, chemistry, laboratory consumables, etc. Our major products are high performance liquid chromatography & gas chromatography consumables such as Chromatography Autosampler Vials with closures, inserts, crimper and syringe filters, etc; Water analysis consumables such as COD test tube. Zhejiang Aijiren Technology,Inc. have been supplying to more than 70 countries, covers more than 2000 customers all over the world. 120 workers, 100,000 class cleaning room, ISO, GMP & Bureau Veritas certificated, this is how we keep high quality and competitive prices for global valued customers.
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CASE
Over 15 years, we have earned an excellent reputation and public praise all over the world.
25
Oct
What the line controls in closed loop versus what it only inspects at the end
A 2 mL clear glass vial lot came off the line at 4.62 mm neck OD against a 4.55 mm nominal, and every autosampler on the customer’s bench started throwing “vial not found” errors at position 47. The glass was fine. The run was fine. The neck gauge on the forming line had drifted 0.07 mm over eleven hours because nobody had recalibrated the air gauge after a tooling changeover. That is the kind of thing a chromatography vial factory actually controls, and it is the thing mo...
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25
Oct
Only four USP chapters actually reach the vial, and two of them do it
A validated USP method for a small-molecule assay failed system suitability on the third injection of a 96-vial run. The peak area RSD hit 2.4% against a 2.0% limit, and the tailing factor on the analyte drifted from 1.08 to 1.31. The column was six weeks old and fine. The instrument had passed its calibration the same morning. The cause was a lot of 9 mm screw-top vials with a septa durometer about 8 Shore A softer than the previous lot, which let the needle punch a partial plug that sat i...
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22
Oct
What coring looks like on the bench and inside the data
I have pulled more torn septa out of an autosampler needle guide than I care to count, and in almost every case the analyst swore the needle was new and the septa were the expensive ones. Coring is one of those failures that gets blamed on the wrong component for months. The vial is usually the accomplice, not the victim. Here is what I have learned about how vial geometry, septa selection, and cap torque combine to destroy needles and shed rubber into your sample. Coring is the mechanical ...
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22
Oct
The four dimensions that actually determine fit
I once watched a lab spend three weeks chasing a “carryover problem” that turned out to be a 32 mm vial sitting in a tray designed for 32 mm vials, except the crimp cap was a 11 mm style on a 12 mm finish, and the autosampler needle was bottoming out 0.4 mm above the sample. The instrument was fine. The method was fine. The vial stack was wrong by a fraction of a millimeter, and nobody had measured it. That is the entire problem with vial selection: the numbers that matter are s...
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