Pura Disc 13mm CA Syringe Filters, 0.45um, 100/Pk
Whatman SKU: 6771-1304

Whatman Puradisc Cellulose Acetate (CA) Syringe Filters, 0.45 µm, 13 mm, 100/Pk - 6771-1304

Whatman maintains in-house specialists who set and verify material specifications separately for its cellulose, glass-fiber, and polymer membrane chemistries, tailoring quality control to how each one behaves in use. Sample preparation for chromatography often ends with a syringe filter on the path to the vial. The cellulose acetate membrane takes up aqueous buffers on contact and binds BSA at 3.8 micrograms per square centimeter. Low-extractable polypropylene keeps sample purity intact through the filtration pass and routes flow to minimize backpressure in service. Where analytical results depend on clean samples, the preparation step stays consistent from sample to sample through a pre-tested syringe filter.

Membrane Characteristics

• Minimal non-specific adsorption of analytes at the membrane surface
• Low extractable contribution keeps filtrate chemistry clean
• Cellulose ester backbone stable across aqueous pH range of 4 to 8
• Naturally hydrophilic surface wets readily with aqueous samples
• Smooth membrane face with even pore distribution across the active filtration area

Housing Characteristics

• PP housing rated to 121°C holds its geometry through high-temperature sample preparation and processing.
• Impact-tolerant polypropylene body withstands routine bench handling without damage
• Polypropylene density near 0.90 g/cm3 keeps housing weight low relative to denser engineering plastics
• Minimal ionic background from the polypropylene housing supports ion chromatography and trace-metal ICP-MS sample preparation.

Clarify your routine aqueous samples in a single pass and cut down on juggling multiple filter types at the bench. Consistent aqueous clarification clears particulates without slowing your bench routine from the first sample of the day through the last. Review our Chemical Compatibility Chart, or ask technical service to confirm chemical compatibility for your specific application.

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

Bubble Point (psi)

2.0 bar (29 psi)

Burst Pressure (psi)

75psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Polypropylene

Diameter

13mm

Filtration Area

1.3cm²

Holdup Volume

<25µl

Material

Cellulose Acetate

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

121°C

Pack Count

100

Pore Size (µm)

0.45

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 10ml

Wettability

Hydrophilic

• IC Sample Prep - CA membrane clarifies aqueous samples before IC injection, protecting guard columns and extending column life without analyte loss.
• Ophthalmic Formulation Prep - Low-extractable CA filters ophthalmic solutions ahead of quality testing and release without contributing contaminants.
• Amino Acid Analysis - Hydrophilic CA clarifies amino acid standards and digest samples for HPLC or ion chromatography quantitation of food and feeds.
• Urinalysis Prep - CA clarifies urine samples by removing particulates ahead of automated urinalysis without altering biochemical composition.
• Biomarker Assay Prep - Low-binding CA prevents biomarker adsorption during sample prep, preserving analyte concentrations for immunoassay panels.
• Low-Volume Sample Prep - CA syringe filters process precious microliter samples with minimal hold-up volume, maximizing recovery of dilute analytes.