Bioactive compounds are different in their properties, however some of them are volatile at room temperature. But the type of compounds and it's source can give a clue of it's properties.
Phenolic compounds they contains hydroxylgroups which can make a hydrogen bonds and make it less likely to evaporate at room temperature. But this type of compounds are variable in properties and some of them are degraded by several factors that could cause a confusing results. However dealing with compounds from natural sources must be with cautious.