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.
02
Nov
The traceability chain for a consumable runs through the process, not the part
The auditor pulled two lots of 2 mL clear vials and asked for the calibration certificate behind the dimensional callout on the CoA. The supplier sent back a certificate for a caliper, not for the gauge block the caliper was checked against. That single missing link is where most ISO 17025 traceability for chromatography vial claims collapse. The lab had a certificate. It did not have a chain. If you run a testing lab under ISO/IEC 17025:2017, you already know clause 6.5 requires measuremen...
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02
Nov
Ghost peaks in HPLC and GC trace back to four material families, not one
A 20 µL injection of mobile A into a 2 mL vial that had been sitting in the autosampler tray for 18 hours produced a peak at 6.42 minutes with an area of 412 mAU·s. The same blank injected from a freshly opened vial gave 3 mAU·s at that retention time. The difference was not drift, not a lamp, not the column. It was the septa, and the ghost peak was the plasticizer package bleeding out of a 10 mm silicone-faced disc at 22 °C. That is the shape of most chromatography vial ghost peaks and ext...
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31
Oct
Four polymers cover 95% of the market, and each fails in a specific way
A 12-position run on a Shimadzu GC-2010 came back with siloxane peaks at m/z 73, 147, 207, and 281 in three of twelve blanks. The septa were silicone, 11 mm, 3 mm thick, and the inlet was running at 280 °C. The lot had been in service for four days. Every blank injected after the fourth day showed the same three-peak train, and the bleed got worse with each subsequent injection. That is not a septa quality problem. That is a material selection problem: silicone at 280 °C in an inlet that se...
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31
Oct
Set the reorder point from lead-time variance, not from a round number
A buyer called me in March because her 9 mm screw-thread vial order had slipped three weeks and her LC-MS batch was down to 11 vials. The root cause was not the vial. It was a reorder point set at 200 units against a consumption rate of 480 per week and a supplier lead time that had drifted from 4 weeks to 7. She had been reordering at 200 for two years because that number “felt safe” when volumes were lower. Three weeks of cover against a seven-week lead time is not safety stoc...
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