9 mL Sera-Separa® Blood Tube Columns with Fine Filter (15–45 µm) — LDPE, Natural, 100/Bag
These Caplugs® Evergreen Sera-Separa® Blood Tube Columns are 9 mL gravity-flow filtration columns molded in low-density polyethylene (LDPE) and fitted with a 15–45 micron fine-filter disk for serum and plasma separation directly inside a standard blood collection tube. Packaged 100 columns per bag and supplied non-sterile, part number 208-3084-020 is dimensioned for standard 16×100 mm (9 mL) blood collection tubes — including SST/gold-top, plain red-top, and lithium-heparin green-top formats — delivering filtrate clarity suitable for photometric chemistry, immunoassay, and coagulation panels without a centrifuge step.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 208-3084-020 |
| Product Type | Sera-Separa® Blood Tube Column with Fine Filter |
| Capacity | 9 mL |
| Filter Pore Size | 15–45 microns (fine filter) |
| Compatible Tube Dimensions | 16×100 mm (9 mL) blood collection tubes |
| Material | Low-Density Polyethylene (LDPE) |
| Color | Natural |
| Sterility | Non-Sterile |
| Pack Size | 100/Bag |
| BPA / Phthalate / Latex | BPA-Free, Phthalate-Free, Latex-Free |
| Country of Origin | USA |
Applications
- Gravity-flow serum separation from clotted whole blood in red-top or SST tubes — no centrifuge required
- Plasma separation from anticoagulated blood in lithium-heparin (green-top) tubes for chemistry and immunoassay panels
- Stat laboratory workflows where centrifuge access is limited or turnaround time is critical
- Point-of-care and low-volume collection stations processing a full chemistry panel plus reflex testing from a single 9 mL draw
- Coagulation and photometric chemistry panels requiring high-clarity, particulate-free filtrate
Compatibility
These columns are dimensioned for standard 16×100 mm (9 mL) blood collection tubes and are compatible with the most widely used formats in clinical laboratories. The table below summarizes verified tube types; always confirm fit on non-standard or regional tube geometries before standardizing.
| Tube Format | Collection Tube Type | Notes |
|---|---|---|
| 16×100 mm, 9 mL — SST / Gold-top | BD Vacutainer® SST II, Greiner Bio-One | Standard serum separator tube — primary application |
| 16×100 mm, 9 mL — Red-top (no gel) | BD Vacutainer®, Sarstedt S-Monovette | Plain red-top; column replaces centrifuge step |
| 16×100 mm, 9 mL — Green-top (Li-Heparin) | BD Vacutainer®, Greiner Bio-One | Plasma separation from anticoagulated whole blood |
The flexible LDPE body allows the column to seat snugly inside the collection tube without the fit-tolerance issues associated with rigid plastics, making it suitable across the range of compliant 16×100 mm tube manufacturers. A sample request for fit verification is recommended before committing to a standing order on non-standard tube formats.
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers / saline | Excellent |
| Serum and plasma matrices | Excellent |
| EDTA anticoagulant solutions | Excellent |
| Sodium citrate anticoagulant | Excellent |
| Lithium heparin | Excellent |
| ISE diluents and mild protease inhibitor cocktails | Good |
| Chlorinated solvents (chloroform, DCM) | Not recommended |
| Aromatic solvents (toluene, xylene) | Not recommended |
Quality & Procurement
Made in USA, these Sera-Separa® columns are produced from FDA-compliant, BPA-free, phthalate-free, and latex-free LDPE resin at a Caplugs® Evergreen U.S. manufacturing facility. LabSupplies.com is an authorized Caplugs® Evergreen dealer and ships from USA inventory, typically same business day for stocking items. Volume pricing and written quotes are available for multi-bag orders and hospital-system standing orders. Laboratories transitioning from OEM or centrifuge-based protocols are encouraged to request a sample for fit verification with their specific collection tube brand before standardizing.
Frequently Asked Questions
Do these columns eliminate the need for centrifugation?
Yes — the 15–45 micron fine-filter disk is designed for gravity-flow separation, allowing clear serum or plasma to pass through while retaining the cellular mass and fibrin clot above the filter plane. This makes them particularly valuable in stat labs, point-of-care sites, and collection stations where a centrifuge is not immediately available.
Which blood collection tube brands and formats will these columns fit?
The columns are dimensioned for standard 16×100 mm (9 mL) tubes, including BD Vacutainer® SST II and plain red-top tubes, Sarstedt S-Monovette, and Greiner Bio-One SST and lithium-heparin tubes. Because tube wall tolerances can vary between manufacturers and regional suppliers, fit verification on any non-standard tube geometry is recommended before placing a standing order.
Are these columns sterile, and can they be autoclaved?
These columns are supplied non-sterile. LDPE is not autoclavable — high-temperature steam sterilization will distort the column body and is not recommended. For applications requiring sterile handling, consult your laboratory's standard aseptic technique protocols.
Is there a smaller-volume version available for pediatric or low-draw applications?
Yes — Caplugs® Evergreen also offers the Sera-Separa® Blood Tube Column in a 5 mL format (part number 208-3193-020, LDPE, 100/Bag) for lower-volume draws. Contact LabSupplies.com for availability and pricing on that item.