I was planning on doing sugar feed tracking/potential contamination in
spring honey next year using this method Emily Noordyke presented 2019.
https://www.youtube.com/watch?v=sUrw1rnuGXs
She was tracking the fate of pollen patties using Brilliant Blue FCF (aka
food coloring) and even without equipment the visual tracking looked quite
impressive.
I think it could work with OA solutions reasonably well. At least worth a
try.
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