Glass Microfiber Mini-UniPrep Syringeless Filters, 0.45um, Translucent Housing, 100pk
Whatman SKU: UN203NPUGMF

Glass Fiber (GF) Syringeless Filters - UN203NPUGMF

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. Glass fiber captures particulates throughout its depth for high loading capacity while wetting rapidly with aqueous samples and offers broad chemical compatibility. The polypropylene housing holds a reliable seal against the membrane edge while staying inert across common laboratory solvents and maintains a low-dead-volume internal flow path. Cleaner, more uniform injections follow, giving the method the reproducibility that quantitative analysis depends on.

Technical Specifications

• Withstands high-temperature pre-conditioning up to 500°C
• Inorganic construction suits demanding sample-preparation chemistries
• Naturally hydrophilic surface wets rapidly with aqueous samples
• Nominal depth retention with high dirt-loading capacity
• Biologically inert borosilicate fiber with broad chemical compatibility

Housing Specifications

• Reliable housing-to-membrane seal prevents bypass at rated pressure
• Medical-grade polypropylene with broad chemical compatibility
• Optimized internal geometry minimizes backpressure in service
• Low extractable contribution protects sensitive downstream analyses

Upstream clarification pays for itself by keeping your columns clear and your analytical day on schedule. Pre-injection filtration protects the resolution your methods depend on across reversed-phase and normal-phase workflows. 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

Glass Fiber (GF)

Pore Size (µm)

0.45

Sterility

Nonsterile

Wettability

Hydrophilic

• Column Lifetime Extension - Consistent sub-micron particle removal before injection reduces column contamination and back pressure buildup.
• Direct Sample Filtration - Built-in membrane clarifies the sample in one manual step, cutting transfer steps before chromatographic injection.
• UHPLC Prep Workflow - Integrated plunger and membrane filter sub-micron particles in one step, meeting stringent UHPLC injection purity requirements.
• Light-Sensitive Samples - Amber housing options shield photosensitive analytes from light during filtration for chromatographic preparation.
• 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.