PTFE UniPrep Syringeless Filters, 0.45um, 50 pack
Whatman SKU: UN113UORG

PTFE Syringeless Filters - UN113UORG

A single syringeless device replaces the separate syringe, filter, and transfer vial, cutting both setup time and the handling steps where analyte is lost or contaminated. PTFE stays chemically inert against aggressive solvents, strong acids, and alkalis and suits solvent filtration where other membranes fail. Polypropylene construction maintains a low-dead-volume internal flow path while contributing minimal extractables to the filtrate and maintains housing integrity through the filtration run. Standardized this way, sample preparation becomes one of the most controlled and repeatable steps in the analytical workflow.

Technical Specifications

• Low extractables keep the chromatographic background clean
• Filters aggressive organic solvents without swelling or breakdown
• Chemically inert against aggressive solvents, strong acids, and alkalis
• Absolute pore size rating gives consistent results across protocols
• Stable across a wide operating temperature range for demanding methods

Housing Specifications

• Resists aqueous acids, bases, and alcohols in routine sample prep
• Reliable housing-to-membrane seal prevents bypass at rated pressure
• Low extractable contribution protects sensitive downstream analyses
• Thermal-bonded construction keeps adhesives out of the fluid path

Protecting sample integrity from preparation through injection keeps your chromatographic results trustworthy. Consistent autosampler-ready components keep your chromatographic methods reproducible so injection-to-injection variability stays low. 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

Polytetrafluoroethylene (PTFE)

Pore Size (µm)

0.45

Sterility

Nonsterile

Wettability

Hydrophobic

• Light-Sensitive Samples - Amber housing options shield photosensitive analytes from light during filtration for chromatographic preparation.
• Column Lifetime Extension - Consistent sub-micron particle removal before injection reduces column contamination and back pressure buildup.
• Aggressive Solvent Matrices - PTFE membrane withstands organic solvents, enabling reliable clarification of solvent-matched sample matrices.
• Pharmaceutical QC Testing - Content uniformity and dissolution samples are clarified in one step, reducing handling before chromatographic injection.
• UHPLC Prep Workflow - Integrated plunger and membrane filter sub-micron particles in one step, meeting stringent UHPLC injection purity requirements.
• Heavy Particulate Samples - Glass microfiber prefilter traps large debris through its fibrous depth, preventing premature membrane blockage.