Glass Microfiber Mini-UniPrep Syringeless Filters, 0.45_m, Trans. Hsg, Slit Sept. Cap, 1000/pk
Whatman SKU: US503NPUGMF

Glass Fiber (GF) Syringeless Filters - US503NPUGMF

By removing the separate filter and syringe from sample preparation, syringeless filters reduce setup time and limit the particulate carryover that can raise autosampler backpressure and shorten column life. Glass microfiber holds structural integrity through high-temperature conditioning cycles and wets rapidly with aqueous samples. The polypropylene housing contributes minimal extractables to the filtrate while routing flow to minimize backpressure in service and maintains housing integrity through the filtration run. For the analyst, that consistency means chromatographic results with less run-to-run variability traced back to sample preparation.

Technical Specifications

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

Housing Specifications

• Resists aqueous acids, bases, and alcohols in routine sample prep
• Thermal-bonded construction keeps adhesives out of the fluid path
• Medical-grade polypropylene with broad chemical compatibility
• Optimized internal geometry minimizes backpressure in service

Reproducible separations start with samples that reach the column free of particulates. 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

Glass Fiber (GF)

Pore Size (µm)

0.45

Sterility

Nonsterile

Wettability

Hydrophilic

• HPLC Sample Prep - Plunger-driven filtration removes particulates from analytical samples, protecting columns from clogging and back pressure.
• Light-Sensitive Samples - Amber housing options shield photosensitive analytes from light during filtration for chromatographic preparation.
• Direct Sample Filtration - Built-in membrane clarifies the sample in one manual step, cutting transfer steps before chromatographic injection.
• Pharmaceutical QC Testing - Content uniformity and dissolution samples are clarified in one step, reducing handling before chromatographic injection.
• 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.