[albada]

If you ask me, given these numbers, I would put a good iron chelating agent into your soup, at least during testing. Note that you pondered about much smaller changes in AA amount than 30% when you formulated and tested your dev, yet I do not think that you always tested your dev within 1 minute of mixing it.

I'll need to run some tests to see if Fe(II) and Fe(III) are a problem. It hasn't *appeared* to be an issue with my mix-to-use times of under an hour, but I won't know for certain until I've run tests. Do you know of an easy way to get a known molarity of these Fe ions in solution? Something better than a rusty nail? In addition, I have some salicylic acid, so I can run with/without tests to see how much difference that makes.

Your link shows that citric acid is good at sequestering Fe(III) but poor with Fe(II). So what else can be used for Fe(II)? How about histamine?

Mark Overton

EDIT: I still haven't seen any data showing that EDTA accelerates the Fenton reaction. I think I'll buy some and try it.