Cellulose acetate (CA) syringe filters are a preferred choice for preparing samples in HPLC, GC, and other analytical workflows. Known for high flow rates and low protein binding, CA filters help preserve sample integrity while delivering reliable filtration performance. The following selections highlight CA membrane filters from reputable brands, with varied pore sizes and formats to fit common lab setups, including environmental testing, food and beverage analysis, and educational laboratories.
| Product | Brand | Pore Size | Diameter | Pack |
|---|---|---|---|---|
| CA Syringe Filters 25mm 0.45μm | ALLPURE | 0.45 μm | 25 mm | 100 |
| CA Syringe Filters 25mm 0.22μm | ALLPURE | 0.22 μm | 25 mm | 100 |
| AMTAST CA Syringe Filter 25mm 0.45μm | AMTAST | 0.45 μm | 25 mm | 10 |
| AMTAST CA Membrane Syringe Filter 25mm 0.22μm | AMTAST | 0.22 μm | 25 mm | 10 |
| Deschem CA Membrane Filter 50mm 0.22μm | Deschem | 0.22 μm | 50 mm | 50 |
CA Syringe Filters 25mm 0.45μm — ALLPURE
Product Introduction: CA syringe filters feature a cellulose acetate membrane housed in a polypropylene body, providing disposable utility for sample preparation. The 0.45 μm pore size suits a range of protein-containing and particulate-laden samples.
Key Features: High flow rate and low protein binding capacity, making them suitable for sample preparation before HPLC and GC analysis. They are designed for broad application in food and beverage testing and environmental lab work.
Applications: Commonly used in food and beverage testing, environmental laboratories, and other settings requiring rapid pre-filtration of aqueous samples.
CA Syringe Filters 25mm 0.22μm — ALLPURE
Product Introduction: Similar CA filters with a 0.22 μm pore size, offering a balance between filtration speed and particulates retention for protein-containing samples.
Key Features: High flow rate and low protein binding provide dependable sample preparation for LC analyses. Suitable for lab workflows needing tighter filtration before instrumentation.
Applications: Frequently used in environmental and beverage analysis, as well as general laboratory workflows requiring clean filtrates for analytical instruments.
AMTAST CA Syringe Filter 25mm 0.45μm
Product Introduction: AMTAST CA syringe filters deliver a cellulose acetate membrane in a disposable, 25 mm format with a 0.45 μm pore size.
Key Features: 10-pack with inlet/outlet connectors (Female luer to Male slip luer), designed for straightforward integration into standard syringes. Suitable for high-flow aqueous solutions.
Applications: Ideal for routine sample clarifications prior to chromatographic analysis or spectroscopic measurements, in teaching labs and professional settings.
AMTAST CA Membrane Filter 25mm 0.22μm
Product Introduction: AMTAST’s 25 mm CA membrane syringe filter with 0.22 μm pore size, designed for precise filtration in lab contexts.
Key Features: Consistent and reproducible results across units; cellulose acetate is hydrophilic with relatively low protein binding, supporting filtrations of aqueous and alcoholic media including protein solutions.
Applications: Suitable for precise sample prep in educational labs, research settings, and routine analytical workflows requiring clean filtrates.
Deschem CA Membrane Filter 50mm 0.22μm
Product Introduction: Deschem CA membrane filters provide a cellulose acetate filter with a 50 mm diameter, broad cartridge surface, and a 0.22 μm pore size.
Key Features: Larger diameter can support higher filtration volumes or use with larger sample batches, while preserving CA’s low protein binding and good flow characteristics.
Applications: Particularly suitable for labs requiring greater filter area for higher throughput, pre-processing larger sample volumes, or reducing clogging during filtration.
SteriLite CA/PES Filter Consideration
Note: Some listings combine cellulose acetate and PES options or offer alternative membrane materials. When selecting CA, verify pore size, diameter, and compatibility with your solvent system to ensure low protein binding and high flow rate. Sterile variants may also be available for specific applications requiring aseptic filtration, particularly in biotech or pharmaceutical contexts.
Buying Guide: Key Considerations For Selecting Cellulose Acetate Syringe Filters
Purpose and compatibility: Match pore size to the target analyte and matrix. 0.22 μm is common for removing bacteria and particulates; 0.45 μm offers faster filtration with lower risk of clogging for clear liquids.
Diameter and capacity: 25 mm filters are standard for most syringes; larger diameters (e.g., 50 mm) increase filtration area for higher volumes but require compatible equipment.
Hydrophilicity and protein binding: CA membranes are hydrophilic with relatively low protein binding, beneficial for protein analysis and aqueous solutions. Consider alternatives (PES, nylon) if chemical compatibility differs.
Sterility and handling: Some applications demand sterile, individually packaged units. For teaching labs or clinical contexts, sterile options reduce contamination risk.
Connectors and compatibility: Check inlet/outlet connectors (luer types) to ensure a tight fit with your syringe setup and avoid leaks or bypass filtration.
Cost and packaging: Packs vary from 10 to 100+ filters. For routine use, larger packs may reduce per-unit cost, but ensure shelf-life and storage conditions meet your lab’s needs.
Quality control: Look for products with consistent unit-to-unit reproducibility and supplier assurances, especially for quantitative analyses where repeatability matters.
Application scope: Consider whether the filters are intended for HPLC, GC, LC-MS, environmental testing, or educational labs, as performance expectations may differ by application.
Regulatory and labeling: For regulated environments, choose suppliers who provide traceability, lot numbers, and material safety data to support compliance documentation.