Anyone here from New England that has a place they like to order this stuff from (either pre-made (in solution) or the individual components)? I'm interested in giving it a trial run and see how well it works, since there appears to be mixed reviews on it.

Eric. I don't have a source for the solution. I had a local lab mix it up for me. I supplied them with this "recipe" and they did the rest. It makes 1 litre so it may be a bit much for your purpose. I store mine in a fridge with the amber bottle wrapped in foil to limit light exposure. I only keep a small amount with me so that it does not go bad.

Recipe:
Directions and uses for alpha, alpha' -Dipyridyl solution.
Preparation
The Soil Conservation Service uses a 0.2% solution of alpha, alpha'-dipyridyl dye to test for iron
reduction. To prepare it, dissolve 77g. of ammonium acetate (NH4OAc) in 1 liter of distilled
water. Add 2 g of alpha,alpha'-dipyridil powder and stir until dissolved. Store the solution in the
dark.
User Notes: You will need a stir bar and electronic mixer to dissolve the reagents. Also, you will
want to do the mixing in the dark as the solution will photo-oxidize and turn pink in light. Store
the solution in a amber glass or wrapped in aluminum.

I like using it.

Yeah...a name of a reputable lab that can make the stuff is what I'm really looking for...thanks for the info.