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We
manufacture glass chromatography columns in every possible
size and configuration to your specifications. Chromatography
columns are as various as chemists. Your choice will depend
on the compounds you want to separate, the quantities, and
your personal predilections...
We describe custom
chromatography columns from the top down: see the sketch.
- Joint style and size: for example, 24/40 Female, 24/40 Rodaviss
(threaded top), 35/25 Socket joint.
- Solvent reservoir size, if any.
- Column tubing size and working length (the length of straight
tubing, above the frit, if used). We normally use medium wall tubing for strength.
A listing of tubing sizes is available here.
- Porosity of fritted filter, if any (typically coarse, medium,
or P3 - between medium and coarse; see below).
- Stopcock size (we generally use 2 mm bore for column diameters
of 2" and below, 4 mm for larger, larger for humongous, per discussion).
- Delivery tip style (angle cut drip tip, pipette-style drawn
tip, Luer joint).
- Plastic coating is an option
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We
like to provide fritted filters in your columns that work best
for you. Many manufacturers use coarse or medium frits, corresponding
to pore
sizes of
40 - 60 µm and 10 - 16 µm. We have found that the European size designated P3 to be best for most column usage; its pore size is between coarse and medium: 16 - 40 µm. Since column packings are frequently called out with a particle size of 40µm, this porosity of frit holds up the packing well, but allows for good flow.
You can see the range of standard frit diameters here. We also manufacture flow control adapters, separable solvent reservoirs, and solvent addition funnels. |
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