Testing stuff for salicylate, phenols etc.

[NotThisGuy]

So I came across this post:

https://www.paleohacks.com/mct-oil/mct-oil-and-salicylate-sensitivity-11490

I stumbled across an interesting fact:

It seems to be relatively easy to detect salicylates in vitro using iron(iii)-chloride. And I happen to have some iron(iii)-chloride lying at home in the garage.

So it might be possible to test the MCT oil before I let my stomach find out, whether salicylates were in it.

Best part is: You can also detect phenols and other nasty food chemicals:

Would be quite a help to have some indicator to test food with. E.g. puree a zucchini, add a few drops of iron(iii)-chloride solution and watch how it changes color. (but don't eat it afterwards, it's poisonous )

Anyone knows if this is legit?

Also I didnt know where to start this thread. Mods can move it.