They are chemically inert and suitable for most chromatography applications. Certified Verex Vials for Chromatography Applications – Phenomenex From start to finish, Verex HPLC, GC, and autosampler vial and cap products are manufactured to Verex Vial, 10mm Screw Top, 2mL, Amber 51 Vial, w/ Patch. Chromatography & HPLC Autosampler Vials