Whatman Puradisc Spartan HPLC Syringe Filter, 30 mm, 0.45 µm, Sterile, 50 Pack, 10462950. Whatman’s Puradisc syringe filters are made to serve a wide variety of applications including capillary electrophoresis, biological preparations, protein filtration, and UV spectroscopy sample preparation. The SPARTAN regenerated cellulose membrane in