Choosing the right filter system can be the difference between accurate and inaccurate results.
PTFE, PES, PVDF and Nylon are the most common filter types. Nylon will provide the most “extractable free” membrane and is good for use with water-based solutions. Many organic solvents are very compatible with nylon and don’t require excessive pressure to use.
Mechanically speaking, nylon membranes are very strong. They can tolerate temperatures up to 50°C and are a good all-around filter for HPLC samples. They work well with bases, most HPLC solvents, alcohols, aromatic hydrocarbons, and THF. You should avoid using them with acids, aggressive halogenated hydrocarbons, and protein samples.
Three Great Brands with Nylon Membrane Filters
- Foxx Life Sciences’ bottle-top filters for solvent filtration have the world’s first single-piece polypropylene (PP) funnel, designed to withstand harsh solvents that would normally degrade traditional bottle-top filter assemblies.
- Nalgene® Rapid-Flow™ sterile filter units are manufactured from clear, durable polystyrene and include an integrated, removable nylon membrane filter. These Nalgene filter units are specifically designed for cell culture and tissue culture applications.
- The Whatman® Zapcap Cellulose Regenerated bottle-top filter units are chemical-resistant, perfect for your more aggressive chemical samples.
All three brands are available in a variety of sizes to fit your needs.
Accurate research demands accurate results. Make sure the filtration system you have is right for you.