Using the good ol' phenolphthalein / NaOH routine. Instructions say
> to discard 6 months after date of manufacture. That strikes me as
> ultra-conservative for a couple of basic chemicals (no pun intended).
> I'm guessing I should be able to stretch the date out some. Yes?? >
NaOH can degrade significantly in 6 months. It can still be used but must be standardized to retain accuracy.
Instructions also say to dilute reds with distilled water in a 1:3
> ratio so color change is more apparent. Does that procedure alter pH
> in any way that I need to accommodate for?
>
pH change of juice/wine from dilution is nominal.
clyde