。、。
Evaporate the solvent from that liquid. What remains is a mass of aromatic compounds and plant wax.
Literal
That liquid [from-から] solvent [object-を] make-evaporate. Remain [nominalizer-の] [topic-は], aroma-component [and-と] plant-wax [genitive-の] mass.
A chemistry/perfumery procedure. 揮発させる is the causative of 揮発する ('to volatilize, evaporate'), marking the experimenter as the agent causing the evaporation. The second sentence uses a cleft construction ~のは~ ('what X is Y') — 残るのは ('what remains is') + 塊 ('mass, chunk, lump'). 香り成分 ('aromatic components') refers to the volatile oils and other odor-active molecules extracted from plants — core vocabulary for perfumery and essential-oil production. 植物ワックス ('plant wax') is the waxy plant matter that doesn't evaporate with the solvent.