Pura Disc 4 mm PVDF Syringe Filters, 0.2um, 100/Pk
Whatman SKU: 6779-0402

Whatman Puradisc PVDF Syringe Filters, 0.2 µm, 4 mm, 100/Pk - 6779-0402

Whatman standardizes its manufacturing platform to the point that consistency and thorough lot-level records come as a default, exactly what analytical laboratory work demands. At the sub-micron pore rating, a syringe filter delivers sterilizing-grade retention at the point of use. Hydrophilic surface modification shields hydrophobic backbone from protein and wets HPLC samples despite a hydrophobic fluoropolymer backbone underneath. Polyolefin construction sheds virtually no extractable material into the sample while maintaining a low-dead-volume internal flow path and holds its seal true run after run. Where bacterial contamination must stay out of the sample, manufacturer-tested retention keeps the instrument and downstream assay protected without a housing to maintain or clean.

Membrane Characteristics

• Hydrochloric, dilute nitric, and up to 90% sulfuric acid cause no attack
• Autoclave sterilization cycles leave pore structure and flow performance intact
• Filtration preserves mammalian cell viability, phenotype, and growth
• Absolute pore rating ensures reproducible results between test runs
• Fluoropolymer chemistry resists microbial and fungal degradation

Housing Characteristics

• Plasticizer-free polyolefin construction keeps the fluid path clean
• Polypropylene density near 0.90 g/cm3 keeps housing weight low relative to denser engineering plastics
• Inert polyolefin wall contributes minimal sample adsorption to the filtrate
• Maintains dimensional form and seal integrity through elevated-temperature sample preparation at its rated limit.

Filtering every buffer before loading keeps your instrument running clean and uninterrupted. Upstream buffer clarification keeps avoidable particulates out of your flow path while keeping the filtrate analytically clean. Start a live chat with our customer support technicians for real-time updates on product availability, lead time, or your order status.

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

Bubble Point (psi)

1.8 bar (26 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)

0.2

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 2ml

Wettability

Hydrophobic

• Spectroscopy Prep - Provides optical clarity and low background interference, ideal for UV-Vis and fluorescence sample preparation work.
• QuEChERS Extract Prep - Removes co-extracted waxes and pigments from QuEChERS extracts, protecting GC-MS and LC-MS systems during pesticide testing.
• Mycotoxin Screening - Clarifies grain and food extracts ahead of HPLC analysis, supporting reliable detection of aflatoxins and other mycotoxins.
• Beverage QC - Clarifies wine, beer, and juice samples ahead of HPLC testing for organic acids, sugars, and preservatives.
• Biological Samples - Clarifies protein-rich solutions without loss of target molecules, preserving sample integrity for critical downstream assays.
• Pharmaceutical QC - Supports routine quality control testing by reliably filtering mild organic solvent mixtures and drug formulations daily.