NG FILTERS AND FABRICATORS offers a wide variety of syringe filters for convenient sample preparation and fluid sterilization. Cellulose Acetate (CA) and Polyether Sulfone (PES) membranes are ideal for samples containing proteins and generally recommended for aqueous solutions filtration. Nylon (NY), PTFE and Regenerated Cellulose (RC) membranes are recommended for organic solvents filtration. Glass Fiber Pre-filter and a cellulose acetate membrane are recommended for highly loaded aqueous solutions.