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Q: dialysis tubing ( No Answer,   3 Comments )
Question  
Subject: dialysis tubing
Category: Science
Asked by: blochee-ga
List Price: $10.00
Posted: 05 Jun 2004 21:13 PDT
Expires: 05 Jul 2004 21:13 PDT
Question ID: 356982
I want a list of all the liquids that can permeate through dialysis tubing.
Answer  
There is no answer at this time.

Comments  
Subject: Re: dialysis tubing
From: touf-ga on 06 Jun 2004 09:42 PDT
 
Unfortunately, this is not a simple question to answer, because there
are dozens and dozens of different types of dialysis tubing out there.
 Dialysis tubing is basically a porous tube, with very small pores
which allow molecules of only a certain size to pass through.

Each type/brand of tube has its own cutoff rating, which is a rating
given that determines what size molecules can pass through.

For example, Spectrapore #6 dialysis tubing has a cutoff of 1,000
Daltons, meaning that a 1,000 Dalton protein will be retained by the
tubing but that smaller solutes will pass through the tubing.

Look at the cutoff rating of your dialysis tube.  Any liquid whose
solutes/molecules are smaller than your pore size will permeate the
tube.
Subject: Re: dialysis tubing
From: touf-ga on 06 Jun 2004 09:45 PDT
 
I should mention, though, that typically, when we're talking about
dialysis tubing, we're talking about water.

Water passes through dialysis tubing, and it carries with it urea and
other waste products from the blood stream into the dialysis machine.
Subject: Re: dialysis tubing
From: synarchy-ga on 07 Jun 2004 16:31 PDT
 
You should also be careful - many liquids will dissolve common
dialysis tubing (ie acetone, methanol).

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