Why membrane pretreatment must use Ethanol? 1

[Yul]

Dear all members,
Hydrophobis membrane usually must be prewetted. And in every book or journal I have read, they always use ethanol.
I am confuse. Why must ethanol?
Why not methanol instead?

Thank you,
Yul

 

[floosh]

Since the membrane is hydrophobic, most permeable species probably interact with the membrane through london dispersion forces. Thus, ethanol has a higher molecular weight than methanol and will have more affinity for the hydrophobic membrane.

Floosh.