I just did my 1st extraction, and I notice that my alks would break out of the solution in a cloud as I added the basic solution and fall back in as the acid solution mix in and was the majority. Until adding enough base they did not stay out.
You could always try to acidify with hcl or vingar and bring to a simmer, add 10g non iodinized of salt per 100ml of water and stick it in the fridge for a few hours. run it through a coffee filter and dry.
We actually worship incomprehensibility as the highest form of explanation. ~TM