Abstract :
Mint leaves (Mentha piperita L.) contain monoterpenoid compounds that can
inhibit bacterial growth. Rose flower (Rosa damascena Mill.) contains geraniol,
eugenol and phenylethyl alcohol. Mint oil and rose oil are formulated into essential
oils. This study aims to determine the effect of differences in the concentration of
essential oils of mint leaves and roses which were made capable of providing the effect
of antibacterial activity on decreasing the number of colonies in the air. Essential oils
are obtained through the distillation process of water and steam with aquadest as a
solvent. Essential oils were made into three concentrations, namely the concentration
of 1%, 2%, 3%. The method used includes setting plate by exposing NA media at three
points in the room and waiting for 15 minutes. Evaporation was carried out using a
humidifier for 15 minutes, 30 minutes, and 60 minutes. The best concentration that was
able to inhibit the growth of bacterial colonies in the room was a concentration of 2%
for 15 minutes with a decrease of 77.39%.