A. Dzhurmanski, G. Zhekova, D. Angelova
Abstract. In the vegetation of rue the content of essential oil in fresh leaves herb doesn’t change and it maintains constant value of 0.1%. However, there are significant changes in content of essential oil of the inflorescence in order of 4-5 times with the lowest values 0.07 -0.1% in stage beginning of blossoming and the highest 0.26-0.49% in stage wax ripeness. Important changes in content of essential oil occurred after the drug drying – it increased to 4-5 times in leaves and inflorescence gathered in stage full blossoming, but in wax ripeness with 2.8 times. The essential oil composition has presented that the main ingredient 2- undecanone increased slightly from 62% in stage full blossoming to 70-73% in stage wax ripeness. In same time 2 – nonanone decreased from 21% to 14%. In some samples gathered in stage wax ripeness has been observed increasing of 2-nonanona to 21%.