Filtration & Separation
Filtration and separation glassware and consumables for vacuum filtration, precipitate collection, solvent clarification, chromatography and TLC. Browse Buchner and fritted-glass funnels, filter flasks, membranes, columns and accessories by size, material and joint.
Showing 1–12 of 45 results
Filtration & Separation, Buchner Funnels
Buechner funnel with joint, slit-sieve and hose connector, 50 ml to 2.0000 ml
Price range: $35.99 through $221.99 Select options This product has multiple variants. The options may be chosen on the product page
Buchner Funnels, Filtration & Separation
Buechner funnel with slit-sieve, 15 ml to 2.000 ml
Price range: $21.99 through $157.00 Select options This product has multiple variants. The options may be chosen on the product pageBuchner Funnels, Filtration & Separation
Buechner funnel, porcelain, diameter 40 mm to 300 mm, with Fixed Sieve Plate
Price range: $10.00 through $188.70 Select options This product has multiple variants. The options may be chosen on the product pageFiltration & Separation, Chromatography Columns
Chromatography column with beaded rim and glass stopcock without frit
Price range: $16.99 through $64.00 Select options This product has multiple variants. The options may be chosen on the product pageFiltration & Separation, Chromatography Columns
Chromatography Column with Beaded Rim and PTFE Stopcock,Without Frit
Price range: $18.99 through $56.14 Select options This product has multiple variants. The options may be chosen on the product pageChromatography Columns, Filtration & Separation
Chromatography Column with Beaded Rim, Glass Stopcock, and G2 Frit, 50 mm Diameter
Price range: $32.23 through $38.59 Select options This product has multiple variants. The options may be chosen on the product pageChromatography Columns, Filtration & Separation
Chromatography column with glass stopcock and joint, without frit
Price range: $21.00 through $52.25 Select options This product has multiple variants. The options may be chosen on the product pageChromatography Columns, Filtration & Separation
Chromatography Column with Joint, Glass Stopcock, and G2 Frit, 50 mm Diameter
Price range: $34.11 through $44.06 Select options This product has multiple variants. The options may be chosen on the product pageFiltration & Separation, Chromatography Columns
Chromatography Column with Joint, Hose Connector, and G1 Frit
Price range: $47.41 through $106.10 Select options This product has multiple variants. The options may be chosen on the product pageFiltration & Separation, Chromatography Columns
Chromatography Column with Joint, Hose Connector, and G2 Frit
Price range: $47.41 through $106.10 Select options This product has multiple variants. The options may be chosen on the product pageFiltration & Separation, Chromatography Columns
Chromatography Column with Joint, Hose Connector, and G3 Frit
Price range: $47.41 through $106.10 Select options This product has multiple variants. The options may be chosen on the product pageFiltration & Separation, Chromatography Columns
Chromatography Column with Joint, Hose Connector, and G4 Frit
Price range: $47.41 through $106.10 Select options This product has multiple variants. The options may be chosen on the product page
Showing 1–12 of 45 results
Filtration & Separation buying guide
Filtration and separation covers the glassware and consumables used to remove solids from liquids, clarify solvents, collect precipitates and prepare samples for analysis. The range includes vacuum filtration flasks, Buchner and fritted-glass funnels, filter membranes and paper, chromatography columns, TLC accessories, and the adapters, clamps and tubing that connect them.
Material choice usually follows the chemistry. Borosilicate 3.3 glass is the default for aqueous and common solvent work; PTFE is used for aggressive chemicals and low-friction seals; polypropylene is common for disposable or vacuum applications. For vacuum work, use a heavy-wall filter flask with a side arm and a trap between the flask and the pump.
Selection usually starts with the filtration format (vacuum, gravity or syringe), then the pore size, then the flask capacity and joint size. As a starting point, 0.22 µm membranes are used for sterilization, 0.45 µm for general clarification and HPLC preparation, and coarser frits or papers for collecting larger crystals. Joints follow standard tapers such as 24/40 and 19/26; adapters bridge mismatched funnel stems and flasks.
If you are unsure which combination fits your application, send the sample volume, solvent, target particle size and available joint size and we will suggest a set.
Frequently asked questions
Buchner funnel or fritted glass funnel?
Buchner funnels use filter paper and are fast for coarse crystals and larger volumes. Fritted glass funnels have a built-in porous disc, work well for fine precipitates and aggressive solvents, and are harder to clean.
Which membrane pore size should I use?
0.22 µm is used for sterilization, 0.45 µm for general clarification and HPLC preparation, and 1–5 µm for coarser particles. Match the membrane material to the solvent.
What flask capacity do I need for vacuum filtration?
Use a filter flask about 1.5–2× the liquid volume, with a side arm and a trap between the flask and the pump. Do not fill the flask to the neck.
How do I match joints and adapters?
Measure the standard taper on both parts (for example 24/40 or 19/26). Use an adapter when the funnel stem and flask joint differ, and use PTFE sleeves where a tighter seal is needed.
Can the same setup be used for chromatography?
No. Chromatography columns and TLC accessories are selected by stationary phase, column dimensions and the separation problem; they are a separate setup from vacuum filtration.
