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.
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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20
Oct
USP <1058> reaches the vial through the injection, not the container claus
A validated assay that had passed three consecutive runs at 98.4% recovery failed on the fourth with a 2.1% RSD across six injections, and the only thing that had changed was a new case of vials pulled from stock. The instrument was the same, the column was the same lot, the standard was the same ampoule. What changed was a septa lot with a different durometer, and the resulting partial coring shed a fragment into the needle path on injection 14. That failure is the reason I stopped treating...
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19
Oct
Why vial failures dominate routine HPLC and GC troubleshooting
I have watched a lot of autosampler trays over the years, and the failures that hurt are almost never dramatic. They are quiet: a slowly rising baseline, a peak that tails a little more each week, a run of samples where the internal standard recovery drifts from 98% down to 87% and nobody notices until the batch fails review. In almost every case I traced back over a decade of investigations, the root cause was a consumable decision made months earlier: the wrong septa, a cap torqued by han...
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