Iṃgor inspects the vial, it'd be hilarious of Alexander grabbed the wrong vial and it was filled with a poison, but he also suspects it being either a cocktail of antivenoms(of which most are useless in this case, and/or slightly poisonous themselves) or a hoax.
In an attempt to check, he uses the tracking spell on a range of just a few centimeters, looking for an antivenom to the venom of the maneater-wasps, also testing the reverse(looking for anything that isn't an antivenom to the venom of the maneater-wasps) to see if the spell can work with these criteria and if the content of the vial would actually help.