Quote Originally Posted by Photo Engineer View Post
TEA here functions as an alkali. TEA is so weak as a chelating agent, it is not considered one as such and is often used in combination with a "real" chelating agent such as EDTA. A chelating agent can be considered a material which combines with specific metal ions and reduces their activity or prevents side reactions from taking place. A good place to learn about TEA and chelating agents is via Wikipedia.
PE
Everyone, thanks for the interesting information.
So the TEA isn't primarily for chelation/sequestration, which makes me wonder why two alkalis are needed (TEA and sulfite).
Do you suppose the TEA is needed to convert the ascorbic acid into ascorbate?
If so, could sodium bicarbonate be used instead?
Hmm, come to think of it, I'm not even sure that the ascorbic acid needs to be converted to ascorbate to be super-additive with phenidone.

I know these additional chems are easy to buy, but I'm trying to avoid turning into a chemical-collector.

Thanks,

Mark Overton