Disks reduce emulsion formation and the amount of solvent required by previous EPA methods.

• Reduce the amount of solvent required by previous EPA methods
• Reduced emulsion formation
• Disks are embedded with specialty bonded silica

These 47 mm glass fiber disks are embedded with specialty bonded silica. No chlorofluorocarbons are needed. Disks meet requirements for EPA method 1664 (a sodium sulfate drying tube and a 0.45 μm PTFE syringe filter may also be used).