Syringe Filter

Chromfil Syringe Filter

Chromfil™ Syringe Filters are designed for routine and demanding sample clarification in analytical laboratories. The filters are available in 13 mm and 25 mm diameters with a range of membrane types including Nylon, PTFE, PVDF, CA, PES, MCE, RC, PP, and GF. The multi-layer membrane structure with a PP or GF prefilter enhances durability and extends filter life when processing dirty or high-particulate samples. Injection-moulded sealing ensures a robust seal under pressure, and the housing is made from virgin medical polypropylene. These filters are intended as a direct replacement for Whatman's Puradisc syringe filters, maintaining compatibility with standard syringe fittings and laboratory workflows.

Multi-layer membrane structure with PP or GF prefilter extends filter life in high-particulate or dirty sample matrices
Injection-moulded sealing withstands 6 bar at 23 C, reducing the risk of housing failure during high-pressure filtration
Available in 13 mm and 25 mm diameters to suit small to larger sample volumes and higher particle loads
Multiple membrane options cover aqueous, organic, and mixed-phase samples, supporting diverse analytical applications

Key Benefits

What This Product Gives You

Multi-layer membrane structure with PP or GF prefilter extends filter life in high-particulate or dirty sample matrices
Injection-moulded sealing withstands 6 bar at 23 C, reducing the risk of housing failure during high-pressure filtration
Available in 13 mm and 25 mm diameters to suit small to larger sample volumes and higher particle loads
Multiple membrane options cover aqueous, organic, and mixed-phase samples, supporting diverse analytical applications
Direct replacement for Whatman's Puradisc syringe filters, enabling method continuity without revalidation

Multi-layer membrane structure with PP or GF prefilter for extended life in dirty samples
Injection-moulded sealing technology for robust seal integrity at 6 bar at 23 C
Housing made from virgin medical polypropylene, non-recycled
Available in 13 mm and 25 mm diameters with filtration areas of 1.09 cm² and 4.08 cm² respectively
Female luer lock inlet and male luer slip outlet for compatibility with standard laboratory syringes
Pore sizes from 0.1 to 5.0 micron across all membrane types
Part numbers clearly indicate membrane type, diameter, pore size, and packing

Where It Is Used

Applications And Buyers

Application Scenarios

Clarifying HPLC and GC sample extracts before injection to prevent column fouling
Filtering tissue culture media and biological buffers containing particulates or protein aggregates
Processing environmental water samples with high organic or particulate content
Handling pharmaceutical eluates and dissolution samples with variable viscosity and particulate load
Supporting high-throughput workflows in QC labs where filter longevity reduces consumable change frequency

Who It Is For

Pharmaceutical QC laboratories processing high volumes of complex biological and organic samples
Environmental and food testing labs handling dirty matrices like soil leachates, beverage extracts, and edible oils
Life-science labs requiring durable filters for cell culture supernatants and protein solutions
Laboratory distributors seeking a full membrane range from one supplier with consistent geometry
OEM partners needing a reliable filter platform for private-label or contract manufacturing

Problems It Solves

Column frits clogging prematurely due to unfiltered particulates in sample matrices
Filter failure under pressure when processing viscous or particle-laden samples
Short filter life in dirty samples due to single-layer membrane limitations
Inconsistent performance across multiple membrane types from different suppliers with varying geometries
Need to revalidate methods when switching between filter brands due to differences in housing or sealing

Data

Specifications

Filter Media	Nylon, PTFE, Hydrophilic PTFE, MCE, RC, CA, PES, PVDF, Hydrophilic PVDF, GF, PP
Housing	PP
Diameter	13 mm, 25 mm
Filtration Area	1.09 cm² (13 mm), 4.08 cm² (25 mm)
Pore Size	0.1, 0.22, 0.45, 1.0, 3.0, 5.0 micron
Sealing Technology	Injection molding
Max Operating Pressure	6 bar at 23 C
Inlet / Outlet	Female inlet lock / male outlet slip
Packing	100 pcs per pack

Materials

Membrane selected per application: Nylon, PTFE, Hydrophilic PTFE, MCE, RC, CA, PES, PVDF, Hydrophilic PVDF, GF, or PP

Customization Options

Choice of nine membrane types across 0.1 to 5.0 micron pore sizes
13 mm and 25 mm housing diameters
OEM printing and private-label packing available through the Microlab OEM division
OEM contract manufacturing and membrane die-cut and packing services for filter brands

How It Is Made

Manufacturing And Quality Control

Manufacturing Process

Membrane die cutting for precise sizing and alignment
Injection-moulded sealing of the multi-layer membrane into the housing
Ultrasonic melting for enhanced seal integrity and structural stability
Part number and membrane type printed on the housing
Packing at 100 pieces per pack

Quality Control

Membrane and housing inspected before assembly
Sealing integrity tested to 6 bar at 23 C to ensure no leakage
Pore size and membrane type verified against the printed part number
Filtration area measured to match specified values for 13 mm and 25 mm formats

Comparison

Compared With The Alternatives

Versus Single-layer syringe filters

The multi-layer structure with PP or GF prefilter improves durability and extends life when filtering dirty or high-particulate samples, though it adds more material to the flow path.

Versus Solvent-bonded housings

Injection-moulded sealing avoids adhesive residues in the flow path and provides a higher pressure rating of 6 bar at 23 C.

Versus Whatman's Puradisc syringe filters

Chromfil™ is specified as a direct replacement, so the same geometry, membrane options, and performance are maintained without method revalidation.

Versus Reusable filter holders

A reusable holder reduces consumable cost but requires cleaning and carries carry-over risk; a single-use filter eliminates both issues.

Use Guide

How To Use It

Select the membrane based on sample chemistry: PTFE and PP for aggressive solvents, PES and MCE for aqueous samples, Nylon and RC for mixed phases
Use 13 mm for sample volumes up to a few millilitres; 25 mm for larger volumes or higher particle loads
Choose 0.45 micron for routine HPLC clean-up; 0.22 micron for sterile-grade or fine particulate removal
Attach the syringe to the female luer lock inlet, expel air, and filter at a steady rate
Discard the first few drops if the method is sensitive to the membrane wetting solvent
Do not exceed 6 bar at 23 C; if pressure rises sharply, switch to a larger diameter or coarser pore size

Photos

Product Gallery

Also In This Category

Related Industries And Guides

How to Choose A Syringe Filter Membrane Syringe Filter Pore Size and Diameter Guide

FAQ

Questions Buyers Ask

Which membrane should I use for organic solvent samples?

For organic solvents, use hydrophobic PTFE or PP membranes. They are chemically resistant and maintain integrity in aggressive solvents.

What is the difference between the 13 mm and 25 mm sizes?

The 13 mm filter has a 1.09 cm² filtration area and is suitable for small volumes. The 25 mm filter has 4.08 cm² and handles larger volumes or higher particle loads before blocking.

Can Chromfil™ replace Whatman's Puradisc filters?

Yes. Chromfil™ is specified as a direct replacement for Whatman's Puradisc syringe filters in the same 13 mm and 25 mm diameters.

What is the maximum pressure the filter can handle?

The filter is rated for 6 bar at 23 C. The injection-moulded sealing technology ensures the housing does not fail under this pressure.

How are the filters packed?

Standard packing is 100 pieces per pack. Each housing is printed with the membrane type, pore size, and part number for easy identification.

Do you offer private-label options?

Yes. The Microlab OEM division provides OEM printing, private-label packing, and contract manufacturing services for filter brands.