Quote Originally Posted by el wacho View Post
are there any other alternatives to borax (within that ph range) that are unbuffered?
buffer capacity of solution depended from borax (or other alkali) concentration. i.e. 1g/l borax is less buffered than 10g/l borax.
you can try baking soda NaHCO3 which give pH~=8.1, or mix it with Sodium Carbonate Na2CO3 for giving any pH in range 8..10.5, depended from proportion NaHCO3 and Na2CO3
some other alkali with pH range
Sodium Citrate - 8.5
Na2HPO4 - 9
TEA - 9.6