pyrogallol acid method for anaerobic condition in lab

alkaline pyrogallol will still absorb oxygen with or without germinating seeds. There is a common chemistry experiment were the percentage of oxygen is determined by mixing pyrogallol and base sodium hydroxide which forms the alkaline pyrogallol. Don't ask me why and how the mechanism is still not clear to me.

its answer is oxygen because pyrogallol absorbs oxygen so used to measure amount of oxygen in any substance

oxygen (O2)

Pyrogallol is a compound that can absorb oxygen.