Quote Originally Posted by albada View Post
@Rudeofus: The buffering should be similar to or even better than XTOL, because the AA will improve buffering some and I'm using more metaborate.
I'm not sure how you arrive at this conclusion. Xtol uses about 100g powder per 1l of regular soup, while your soup uses about 15 g/l, so even diluted Xtol has more powder per liter. I don't know the composition of Xtol but would assume that some of that amount of powder helps buffering. AA has pKa values of 4.1 and 11.8, which will not help buffering around pH of 8.3.