HPLC & Chromatography Vials, 8mm, Cap Size: 8mm Chromatography vials are containers designed to temporarily hold samples analyzed as a part of gas (GC) or liquid (HPLC) chromatography. Tisch Scientific offers an extensive selection of vials that have passed the ISO9001:2015 quality certification making them the highest quality in the industry to ensure the most accurate analysis of your samples.