Pura Disc 13mm PES Syringe Filters, 0.45um, 500 Pk
Whatman SKU: 6781-1304

Whatman Puradisc Polyethersulfone (PES) Syringe Filters, 0.45 µm, 13 mm, 500/Pk - 6781-1304

Whatman's filtration expertise, refined across a century-plus of disciplined manufacturing, has made its name synonymous with laboratory-grade quality worldwide. Syringe filters span a wide range of membrane chemistries and pore sizes, so the format can be matched to the sample matrix and solvent system in use. The PES matrix tolerates aliphatic alcohols, glycols, and aqueous buffers and maintains absolute retention accuracy at that pore rating. Polypropylene construction holds its dimensional form through high-temperature sample preparation while pressing snugly against the membrane during the pass and keeps the sample chemically unaltered across the pass. Where analytical results depend on clean samples, the preparation step stays consistent from sample to sample through a pre-tested syringe filter.

Technical Specifications

• Inherent hydrophilicity allows instant aqueous wetting with no pre-wetting step
• Absolute pore size rating holds consistent across every lot
• Pore structure integrity holds through autoclave cycles up to 126°C
• PFAS extractables test non-detectable under EPA Method 537.1
• Aromatic sulfone backbone underlies stability across the full pH range

Housing Specifications

• Dilute aqueous acids, bases, and alcohols used in sample prep do not degrade the polypropylene housing
• Standardized luer connection geometry provides secure engagement with standard syringe tips
• Low moisture absorption keeps the housing dimensionally stable through humid storage and shipping
• Minimal intrinsic autofluorescence from the polypropylene housing supports background-sensitive fluorescence-based assay work downstream.

Filtering buffers, reagents, and aqueous samples keeps your preparation moving and consistent. Consistent aqueous clarification clears particulates without slowing your bench routine the same way every time you run it. Standardize your filtration purchases across every method with volume pricing and documentation from the Tisch Scientific team.

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

Bubble Point (psi)

2.3 bar (33 psi)

Burst Pressure (psi)

75psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Polypropylene

Diameter

13mm

Filtration Area

1.3cm²

Holdup Volume

<25µl

Material

Polyethersulfone (PES)

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

121°C

Pack Count

500

Pore Size (µm)

0.45

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 10ml

Wettability

Hydrophilic

• Urine Drug Screening - Clarifies protein-poor urine samples for dilute-and-shoot LC-MS/MS toxicology testing without adsorbing target drug analytes.
• Nucleic Acid Recovery - Processes DNA and RNA extracts with minimal nucleic acid adsorption, preserving yield on the hydrophilic PES surface.
• Serum Filtration - Clarifies serum and plasma samples quickly while retaining critical proteins needed for accurate downstream analytical testing.
• Biological Assays - Protects sensitive enzymatic and antibody-based assays from particulate interference without adsorbing critical reagents.
• Pesticide Residue Testing - PES membranes improve polar pesticide recovery in food-safety LC-MS/MS testing versus hydrogen-bonding nylon.
• Biological Fluids - Filters buffers and biological fluids efficiently, using the PES membrane to maximize flow and minimize non-specific binding.