Waters Certified Sample Vials Whitepaper 720001303EN Waters LCMS Certified Sample Vials Whitepaper 720001517EN TruView LCMS Certified Sample Vials Whitepaper 720004097EN CHEMISTRY TESTS LC/GC Certified Vials are UV-tested by HPLC. The HPLC test detects trace levels of chemicals used in the manufacturing and packaging process.