Quote Originally Posted by MattKing View Post
Are aware whether any research work has been done with a goal of developing such tests? Not just for X-Tol, but for other chemicals as well (e.g. E6 and C41). It seems to me that in the current circumstances, such tests would be much more likely to be commercially valuable than when volumes were higher.
There is such a test and it's called "running a test strip". The biggest problem with this test and Xtol is that (at least according to some accounts) Xtol went from fully working to complety inactive in the brief timeframe between clip test and dev run.

Mark's suggestion "just add some pH balanced AA to the mix right before using it" seems like the easiest method for overcoming this issue. It should work both with his dev and with Xtol.