Regen. Cellulose Mini-UniPrep Syringeless Filters, 0.45um, Translucent Housing, 100pk
Whatman SKU: UN203NPURC

Regenerated Cellulose (RC) Syringeless Filters - UN203NPURC

Syringeless filters consolidate the syringe-and-filter routine into one disposable assembly, reducing setup time and the multi-step handling that conventional filtration requires for each sample. Naturally hydrophilic regenerated cellulose wets on contact with aqueous samples while limiting sample adsorption across the run and removes particulates before analysis. The PP housing prevents sample bypass under rated operating pressure and resists aqueous acids, bases, and alcohols. For the analyst, that consistency means chromatographic results with less run-to-run variability traced back to sample preparation.

Technical Specifications

• Stable across the aqueous pH 3 to 12 range
• Stable against DMSO and compatible with common aqueous and organic HPLC solvents
• Absolute pore size rating gives consistent results across protocols
• Low extractables give a clean chromatographic background
• Naturally hydrophilic surface wets without pre-wetting in aqueous and solvent samples

Housing Specifications

• Reliable housing-to-membrane seal prevents bypass at rated pressure
• Thermal-bonded construction keeps adhesives out of the fluid path
• Low extractable contribution protects sensitive downstream analyses
• Medical-grade polypropylene with broad chemical compatibility

Sample clarification before injection is the cheapest insurance your chromatography system has. Upstream sample clarification keeps your separations clean and reproducible from sample preparation through final injection. Start a live chat with our customer support technicians to confirm closure and septa compatibility for your method.

For more information about chemical compatibility, please review our Chemical Compatibility Chart.

Material

Cellulose

Pore Size (µm)

0.45

Sterility

Nonsterile

Wettability

Hydrophilic

• Solubility Assay Filtration - Positive-pressure filtration cleanly clarifies small sample volumes, supporting accurate solubility determination.
• Light-Sensitive Samples - Amber housing options shield photosensitive analytes from light during filtration for chromatographic preparation.
• Pharmaceutical QC Testing - Content uniformity and dissolution samples are clarified in one step, reducing handling before chromatographic injection.
• Direct Sample Filtration - Built-in membrane clarifies the sample in one manual step, cutting transfer steps before chromatographic injection.
• High-Throughput Prep - Disposable single-unit format speeds batch sample preparation by eliminating syringe assembly and cleanup between samples.
• HPLC Sample Prep - Plunger-driven filtration removes particulates from analytical samples, protecting columns from clogging and back pressure.