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.
Learn more
CASE
Over 15 years, we have earned an excellent reputation and public praise all over the world.
28
Oct
What each molding process can actually hold on a 2 mL vial
A 2 mL clear glass vial that mics at 11.98 mm on the outside diameter can still jam a 12-position autosampler tray if the same lot measures 12.06 mm at the shoulder, and that is the call I got on a Tuesday morning after 340 injections had run clean. The instrument was fine. The tray was fine. The chromatography vial lot had drifted 0.04 mm on a dimension nobody was charting. That is the whole argument for treating chromatography vial dimensional tolerance capability as a process property, n...
MORE
28
Oct
SW-846 barely specifies the vial, and that is the trap
The auditor asked for the vial lot number before she asked for the calibration curve. That was the whole visit, really. We had run Method 8260C volatiles for eleven years, and the first document pulled during the EPA method audit was a receiving log showing which case of 40 mL vials went into the batch that produced a failed 5% relative standard deviation on the internal standard area. The vial was never on the method’s list of critical supplies. It was on the auditor’s list fro...
MORE
27
Oct
Evaporation loss is a gravimetric problem before it is a chromatographic one
A 96-vial sequence on a GC-FID running EPA 8260 volatiles lost 4.1% of its internal standard response between vial 12 and vial 78, and the autosampler never flagged an error. The instrument was fine. The vials were fine on day one. What changed was that the analyst had switched to a new lot of caps, and the new septa had a compression set 18% higher than the old ones, so once the robot pierced them the seal never came back. That is the failure this article is about: chromatography vial seal...
MORE
27
Oct
Tested versus nominal: the distinction that decides whether the sheet is
A customer sent me a certificate of analysis last March for a lot of 2 mL clear crimp vials that had failed his autosampler three times in a week. The sheet said CV < 1.0% on “critical dimensions.” I asked which dimensions, over how many cavities, and whether the CV was calculated on the sample or on the mold. He did not know, and neither did the distributor. That datasheet was technically true and practically useless, which is the most common failure mode in this category. R...
MORE
x