Using certified, application-specific, contaminant-free vials can for optimum performance in HPLC, GC/MS, LC/MS, and high-throughput analysis. Vials and caps | Chromatography | MACHEREY-NAGEL. Vials for GC, HPLC, Headspace, IC, TOC and storage. Our autosampler vials are made from 1st hydrolytic class glass under strict hygienic conditions. Lab Vials & Microplates | DWK Life Sciences. Our ISO 9001 facility manufactures vials that meet or exceed OEM specifications for headspace, routine HPLC