Identification of the Key Aroma Compounds in Dried Roots of Isatis tinctoria

Abstract

The compositions of the essential oil from Baphicacanthis Rhizome, dried roots of Isatis tinctoria (Cruciferae), have been investigated by capillary GC and GC/MS. The important odor-active compounds were also detected in the oil using GC-O and AEDA. As a result, the oil was revealed to contain 70 components, representing 97.4% of the total oil. The oil was composed of many nitrogen-containing components, such as 4-pentenonitrile (67.4%), benzenepropanenitrile (3.6%), 5-methyl hexanenitrile (3.5%) and 4-isothiocynato-1-butene (2.9%). AEDA and GC-O showed that 5-methyl hexanenitrile, skatole, benzenepropanenitrile, (E)-2-hexenal and menthol were the most aroma characteristic compounds of the oil.

Key Word Index:

• Isatis tinctoria
• essential oil composition
• aroma extract dilution analysis
• 4-pentenonitrile