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Subject: Copolymer material for O2 membrane

Date: 06/13/02 at 3:45 PM
Posted by: Jackie Charbel
E-mail: jcharbel@YSI.com
Message Posted:

Is there a polymer which could be used for dissolved oxygen membranes that has a lower flow dependence than teflon? The membrane must be submerged in water to record a DO reading, and I am having difficulty with low turbidity leading to a false reading due to the oxygen in the water being reduced so quickly that it cannot be replaced in non-turbid water, so the DO appears to be lower than it's actual percentage. I have tested LLDPE, HDPE, PVC/PVDC, and various polyalkanes. I need a material which is O2 permeable, but not too permeable, which leads to false readings. Perhaps a copolymer crystalline/amorphous material?

Thank you,
Jackie Charbel

YSI Inc.

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