"how will i now if my non-polar is super saturated"
You should estimate, according with how much grams of pseudo your working with, it's fairly easy to estimate how much solvents you should use. (Make your aqueous base solution now)
1. If you have dry PM at 200ML make a aqueous layer of 350ML with no base,
2. heat it up a few degrees,swirl, it's a option to wash the polar layer with NP or not,
3. add enough NP to reach to 450ML,
4. add base, swirl around a minute or so (or longer)
5. seperate,and repeat #3, 2 or more times, then finish the rest of the procedure.
Most common solvents will hold a substantial bit of alkaloid at room temp (anybee feel free to post statistics) but you don't want to waste solvents while you can use them properly (and limit ammount of waste)and conserve, but you also don't want to use not enough so there is goods still in the polar layer before you throw it out (thats what happens when you try to conserve your solvents a little too much.)
If you really want to get the last of all the pseudo do more than 3 of the seperations menchined above. (solvent costs!)
also: pH measurents will not work with NP solvents only with polar.