2.4 mL Caps, PP, Natural — 208-3049-03S | 200/Bag | Caplugs® Evergreen

2.4 mL Mini Column with Medium Filter (45–90 µm), PP, Natural — 200/Bag

These 2.4 mL polypropylene mini columns feature an integrated medium filter (45–90 µm pore range) for sample clarification and cleanup prior to photometric or chromatographic analysis, supplied non-sterile in 200/Bag format. The natural (colorless) PP construction delivers excellent chemical resistance, low extractables, and dimensional stability under centrifuge forces up to 3000×g — making part number 208-3049-03S well suited for serum, plasma, and urine matrices in clinical and bioanalytical workflows. The filter disk is integrated during molding rather than bonded post-process, eliminating adhesive leachables at the filter-matrix interface.

Technical Specifications

Applications

• Serum and plasma clarification before downstream photometric or chromatographic analysis
• Urine particle removal prior to immunoassay, GC-MS, or LC-MS/MS in drug screening and toxicology workflows
• Research and bioanalytical SPE cleanup before LC-UV or LC-MS/MS — the 2.4 mL capacity accommodates higher sample loads than 0.5 mL mini columns
• Method development and exploratory SPE protocols where the 200/Bag format allows cost-effective low-volume trials
• General sample prep on bench microcentrifuges (gravity-flow or centrifuge-assist up to 3000×g) and vacuum SPE manifolds

Compatibility

These mini columns are designed for bench microcentrifuge use with 2 mL or 5 mL collection tubes at up to 3000×g, and are also compatible with 12- or 24-port vacuum SPE manifolds and manual gravity-flow bench stands using 5 mL collection tubes (verify column outer diameter against your specific manifold port before use). The 2.4 mL capacity directly addresses workflows that require greater filtrate volume than the 0.5 mL mini column format (208-1289-03S, Pink) can provide — particularly higher-volume serum, plasma, and urine samples in clinical chemistry and bioanalytical labs. A 1000/Bag sibling SKU (208-3049-030) is available for high-throughput operations requiring improved per-unit economics.

Chemical Resistance

Quality & Procurement

Made in USA, these Caplugs® Evergreen mini columns are manufactured under ISO 9001 quality management from FDA-compliant, BPA-free, phthalate-free, latex-free polypropylene resin. The filter disk is molded in place — not adhesive-bonded — ensuring a leachable-free filter interface critical for enzymatic and LC downstream assays. LabSupplies.com is an authorized dealer of Caplugs® Evergreen consumables and ships from USA inventory, typically same business day for stocking items, with volume pricing available for institutional, clinical, and grant-funded laboratories.

Frequently Asked Questions

What is the maximum centrifuge speed for these mini columns?
These polypropylene mini columns are dimensionally stable under centrifuge forces up to 3000×g, which covers standard bench microcentrifuge protocols for serum, plasma, and urine clarification.

Are these mini columns sterile?
No — they are supplied non-sterile in 200/Bag packaging. For the vast majority of sample clarification and SPE applications, sterility is not required; consult your method SOP if your workflow has specific requirements.

How does this column differ from the 0.5 mL mini column (208-1289-03S)?
The 2.4 mL capacity handles higher sample loads per column, making it the better choice for workflows where serum, plasma, or urine volumes exceed what a 0.5 mL column can process. The 0.5 mL version is pink for visual identification; these are natural (colorless), so distinguish the two formats by part number when both are in use on the same prep bench.

Is a larger pack size available for high-throughput labs?
Yes — the same 2.4 mL PP Natural medium-filter column is available in a 1000/Bag format (208-3049-030) for labs running higher sample volumes where per-unit economics are a priority.