Syringe filters Spartan®, Regenerated cellulose Versatile use - ready-to-use filter units with a hydrophilic, low protein-binding membrane made of regenerated cellulose. First class chemical resistance against the usual aqueous and organic HPLC solvents -Spartan® 13 and 30 are tested and certified for UV absorbance substances at wavelengths of 210nm and 254nm with water, methanol and acetonitrile; -Spartan® 13 has an extremely low hold up volume; <10µl, for optimal filtration Applications: Ideal for HPLC sample preparation to achieve reproducible results. Carefully controlled manufacture guarantees lowest traces of UV- absorbing, extractable components.