Pura Disc 4 mm PVDF Syringe Filters, 0.45um, 100/Pk
Whatman SKU: 6779-0404

Whatman Puradisc PVDF Syringe Filters, 0.45 µm, 4 mm, 100/Pk - 6779-0404

Whatman applies the same process controls across its filtration portfolio, verifying rated performance at the production lot level. A syringe filter seats a membrane in a sealed housing that threads onto a standard luer fitting. Hydrophilic PVDF suits HPLC sample preparation and aqueous clarification and minimizes protein binding for high analyte recovery. The polypropylene housing contributes minimal extractables to the filtrate while routing flow to minimize backpressure in service and holds a reliable seal against the membrane edge. When chromatographic methods demand particle-free injections, point-of-use syringe filtration clarifies the sample before it reaches the column.

Technical Specifications

• Thin membrane structure sustains high flow for fast sample throughput
• Ultra-low protein binding preserves dilute analytes for maximum recovery
• Resists HPLC mobile phases, alcohols, and mild hydrocarbons
• Mechanically durable membrane holds integrity under filtration pressure
• Low extractables preserve a clean chromatographic baseline

Housing Specifications

• Optimized internal geometry minimizes backpressure in service
• Medical-grade polypropylene with broad chemical compatibility
• Reliable housing-to-membrane seal prevents bypass at rated pressure
• Thermal-bonded construction keeps adhesives out of the fluid path

Filtering buffers, reagents, and aqueous samples keeps your preparation moving and consistent. Consistent aqueous clarification keeps your sample preparation moving across the buffers and reagents your methods rely on. Request a quality certificate, lot documentation, or a blanket-order quote from the Tisch Scientific support team.

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

Bubble Point (psi)

1.2 bar (17 psi)

Burst Pressure (psi)

75psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Polypropylene

Diameter

4mm

Filtration Area

0.2cm²

Holdup Volume

<10µl

Material

Polyvinylidene Difluoride (PVDF)

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

100°C

Pack Count

100

Pore Size (µm)

0.45

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 2ml

Wettability

Hydrophobic

• HPLC Sample Prep - PVDF provides a great balance of chemical compatibility and low background noise for sensitive UV detection
• Clarification of Biologicals - Perfect for removing particulates from biological fluids without removing the target biomolecules
• Western Blotting - Optimized for use in preparing samples for downstream blotting techniques where purity is paramount
• Protein Analysis - Ultra-low protein binding ensures that your expensive protein samples are not lost to the filter matrix
• Quality Control Testing - Optimized for delivering reproducible results by removing particulates in standard pharmaceutical protocols
• Particulate Removal - Designed for removing particulates, this filter aids in protecting analytical instruments across diverse sample types