Syringe and syringeless filters For sample preparation before HPLC, uHPLC and ion chromatography GE Healthcare offers a complete range of Whatman syringe and syringeless filters. Use the selection guide to identify the optimal product for your sample preparation needs. Whatman GD/X™ and Mini-UniPrep™ filters are particularly well-suited to the requirements of food and beverage testing. GE Healthcare also offers a complete range of single-membrane syringe filters: Puradisc and SPARTAN™ |