Best Lab Filters AI pick
Chosen by an AI model from its trained knowledge, with its reasoning.
AI pick (brand): Whatman
Whatman (Cytiva) covers papers, glass fiber, membranes and syringe filters, and its grade numbers are the shared reference most lab methods are written against.
Not for: Labs whose validated methods already name another supplier's catalog numbers, since switching brands can mean revalidating the method.
What the AI looks for in Lab Filters
- Format matches the job
- Paper for routine gravity or Büchner work, glass fiber for gravimetric or solids loading, membranes for defined pore-size or sterile work, ultrafiltration for concentrating molecules by molecular weight Buying the wrong format is the most common mistake, and no grade within that format can make up for it.
- Retention rating
- Membranes and syringe filters use absolute pore size (0.2/0.22 µm sterilizing, 0.45 µm clarifying); papers and glass fiber use nominal particle retention A nominal retention figure on paper is not comparable to an absolute membrane pore size.
- Chemical compatibility
- Check the filter material against your solvent, pH and temperature An incompatible material can swell, dissolve or leach extractables into your filtrate.
- Method or standard callout
- If an SOP or standard method names a grade, buy that grade Results are only comparable when everyone uses the same filter.
Brands that matter
- Whatman (Cytiva): Reference grades for filter paper and glass fiber; also sells membranes and syringe filters.
- MilliporeSigma (Merck Millipore): Strong in membranes, syringe filters, sterile vacuum filters and Amicon ultrafiltration.
- Pall: Acrodisc syringe filters and a broad membrane and ultrafiltration range.
- Sartorius: Membranes and Vivaspin centrifugal concentrators.
- Thermo Scientific Nalgene: Disposable bottle-top and filter-unit systems.
- Corning: Sterile vacuum and bottle-top filter systems for cell culture.
What to avoid
- Unbranded filters with no stated retention rating or material
- Filters labelled 'sterile' that list no sterilization method and no lot traceability, for cell culture work
Questions
Is 0.2 µm the same as 0.22 µm?
In practice yes. Both are used for sterilizing-grade membranes, and the label varies by manufacturer.