A 20 μm polyethylene disc sealed to an acrylic ring. Installed on top of column packing in an open-ended column, it protects the packing from disruption.
历史批次信息供参考:
分析证书(COA)
Lot/Batch Number
It looks like we've run into a problem, but you can still download Certificates of Analysis from our 文件 section.
