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Topic: instrumen for MWCO  (Read 2358 times)

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Offline khaza

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instrumen for MWCO
« on: March 28, 2017, 01:15:15 AM »
I have a membrane and want to determine the MWCO of it. So i will be using PEG 4000 and PEG 10000 as the solute. What is the best instrument to test the MWCO?

Offline Babcock_Hall

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Re: instrumen for MWCO
« Reply #1 on: March 28, 2017, 09:16:48 AM »
Is this a homework problem?  What are your thoughts?

Offline khaza

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Re: instrumen for MWCO
« Reply #2 on: March 28, 2017, 10:55:44 AM »
no this is not homework. Im thinking to use the GPC, but i am only using single solute, not a mixture.

Offline P

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Re: instrumen for MWCO
« Reply #3 on: March 28, 2017, 11:24:05 AM »
As long as your GPC solvent doesn't cause the polymer to crash out of its PEG solvent in the column then it should work no? What other MW measurement options do you have? Light Scattering?
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Offline Babcock_Hall

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Re: instrumen for MWCO
« Reply #4 on: March 29, 2017, 11:39:53 AM »
What about testing the membrane in an ultrafiltration experiment with PEGs of various molecular weights?

Offline khaza

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Re: instrumen for MWCO
« Reply #5 on: March 29, 2017, 10:28:08 PM »
yes a light scattering, but i dont have any idea how it works.

Offline khaza

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Re: instrumen for MWCO
« Reply #6 on: March 29, 2017, 10:31:51 PM »
yes im currently doing an unltrafiltration with my membrane using various PEG MW let says 4000 and 10000. But then, after the filtration occured, what kind of instrumen do i need to use to determine the 90% rejection since this is a single solute which is PEG, i dont have any idea of any other instrument other than GPC and how does it work

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