Screw vials for chromatography clear, 15 x 45 mm, 4 ml, 100 pcs

Preassembled kit of 2 ml UltraClean vials + polypropylene screw caps (9-425). Special for contamination-free sampling and sensitive testing, it is widely used for GC-MS, LC-MS and MS-MS as well as being a good solution for avoiding ghost peaks in chromatography. In the ''pre-slit'' model, the septum is pre-pierced for optimal injection. Vials have a flat bottom, writing area. Available in clear glass and amber glass. Each kit has its own certificate