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Sample Filtration

Frequently Asked Questions

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Do you have anything to assist with non-traditional small volume blood sample collection?
We have designed and manufactured a dried blood spot (DBS) system that provides many efficiency gains over simple hand tools. We also have the hard to find end-to-end micro pipettes prefilled with anticoagulant.
What types of filter membrane material do you offer and how do I choose?
We have a wide range of filter membranes: PP, PES, PVDF, glass fiber, nylon, PTFE and CA. Here is a schematic to assist in selecting the applicable membrane for your sample.
How do I select the proper SPE product for my sample?
We have an easy to read SPE selection guide that you can reference below or within our main catalog (both print and PDF versions available).
Do you have filter plates specialized for protein crash assays?
Our proprietary 1 mL protein crash plates (PN 60513) are made under tight tolerances in our NJ facility. We designed a unique membrane combining the hydrophilic, hydrophobic and a frit properties in one.
What are your MWCO filter recommend spin duration and max rcf (relative centrifugal force)?
The optimal centrifuge force is dependent on your sample. Generally we recommend you start with the most dilute form of the sample. For the 96 well filter plate format please use a low rcf ( <1000 xg ) in a first trial for 10 minutes. If the filtration is incomplete, increase the centrifugation time by estimation to drive to completion and /or increase the rcf incrementally to a satisfactory filtration rate. Do not spin at more than 2000 xg. Please use a good fitting collection plate below the filter plate. For micro-centrifuge format you can spin up to a max of 15k xg.
micro spin

Spin Filters

Cat protein crash plate

Filter Plates

Vacuum filtration systems

Vacuum Filtration Systems

Centrifuge Tubes


EquaVAP­® Evaporators

Rapidly evaporates common organic solvents (0-100LPM) Internal flow equalizers – distributes equal output across all needle ports to ensure even and symmetrical...
47mm 1000mL glass container

Mobile Phase Filtration Systems, Filter Tubes & Accessories

Cat syringe filter syringes

Syringe Filter Syringes