Dp PP Mini-UniPrep Syringeless Filters, 0.45um, Translucent Housing, Standard Cap, 100/Pk
Whatman SKU: UN203NPUDPP

Polypropylene (PP) Syringeless Filters - UN203NPUDPP

For analysts clearing high sample volumes, syringeless filters combine the membrane and prefilter into one disposable format, shortening setup and keeping the prep workflow uninterrupted. Polypropylene keeps binding low while capturing particulates through its depth and holds up to aggressive process chemistries. The polypropylene housing resists aqueous acids, bases, and alcohols while keeping the fluid path low in extractable contamination and routes flow to minimize backpressure in service. For the analyst, that consistency means chromatographic results with less run-to-run variability traced back to sample preparation.

Technical Specifications

• Low binding with nominal depth retention and high dirt-loading capacity
• Low extractables protect sensitive downstream analyses
• Sustains throughput on particulate-laden solvent samples
• Hydrophobic matrix suits solvent and non-aqueous sample streams
• High resistance to organic solvents, acids, and bases

Housing Specifications

• Medical-grade polypropylene with broad chemical compatibility
• Reliable housing-to-membrane seal prevents bypass at rated pressure
• Resists aqueous acids, bases, and alcohols in routine sample prep
• Optimized internal geometry minimizes backpressure in service

Sample clarification before injection is the cheapest insurance your chromatography system has. Pre-injection filtration protects the resolution your methods depend on by clearing particulates ahead of the column and frits. Send your autosampler model to our technical service team and request a vial and closure recommendation.

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

Construction

Polypropylene (PP)

Material

Polypropylene (PP)

Pore Size (µm)

0.45

Sterility

Nonsterile

Wettability

Hydrophobic

• Direct Sample Filtration - Built-in membrane clarifies the sample in one manual step, cutting transfer steps before chromatographic injection.
• Light-Sensitive Samples - Amber housing options shield photosensitive analytes from light during filtration for chromatographic preparation.
• UHPLC Prep Workflow - Integrated plunger and membrane filter sub-micron particles in one step, meeting stringent UHPLC injection purity requirements.
• Column Lifetime Extension - Consistent sub-micron particle removal before injection reduces column contamination and back pressure buildup.
• Solubility Assay Filtration - Positive-pressure filtration cleanly clarifies small sample volumes, supporting accurate solubility determination.
• High-Throughput Prep - Disposable single-unit format speeds batch sample preparation by eliminating syringe assembly and cleanup between samples.