I am working on membrane fabrication and want to determine the isoelectric point of the membrane. I am searching for a method for the same without using any instrument. Requesting the research community to kindly suggest the same.
Thank you.
I'm confused by your question. Measuring the zeta potential of a membrane would imply using streaming potential. The Zetameter is a microelectrophoresis instrument. It measures the velocity of particles dispersed in a liquid.
Are you wanting to measure a membrane or particles made from the same material?
By definition, the isoelectric point is the pH at which the velocity of particles in an externally applied electric field is zero. So, you need some kind of instrument to apply an electric field and measure velocity (or flow liquid through a membrane and measure potential).
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