Comparative Sampling Procedures for the Volatile Flavor Components of Codonopsis lanceolata

전처리 방법에 따른 더덕(Codonopsis lanceolata)의 휘발성 향기성분 비교 분석

  • 김정한 (연세대학교 식품공학과) ;
  • 김경례 (성균관대학교 제약학과) ;
  • 김재정 (연세대학교 식품공학과) ;
  • 오창환 (연세대학교 식품공학과)
  • Published : 1992.04.01

Abstract

Volatile flavor components of Codonopsis lanceolata were extracted by gas co-distillation (GCD), solvent extraction/fractionation (SEF), and headspace sampling (HSS) methods. The extracts were analyzed by dual-capillary gas chromatography-retention index (GC-RI) and gas chromatography-mass spectrometry(GC-MS). The two extracts prepared by SEF and HSS gave more similar fragrance to the Codonopsis lanceolata than the GCD extract. The GC profiles of the SEF and HSS extracts were similar to each other except for differences in peak areas. The extract prepared by SEF gave a sweet note while the extract prepared by HSS gave a green note. The GCD extract began to give a burnt note of herb medicine with prolonged distillation. Rapid extraction of flavor components from Codonopsis lanceolata was possible in several short steps by SEF and HSS methods compared to GCD. GC-MS and GC-RI were used for peak identification. GC-RI was more effective for identification of isomers, and polar FFAP column was more suitable for identification of polar compounds. From Codonopsis lanceolata we identified 35 volatile flavor constituents, 24 of which have not been previously reported by simultaneous distillation extraction method $^{(5)}$. trans-2-Hexanal, cis-3-hexen-1-ol, trans-2-hexen-1-ol, and hexanol were considered key components of the green note and 1-octen-3-ol, the component of the fresh note. Esters, including amyl propionate, seem to be responsible for the sweet note particular to Codonopsis lanceolata.

Keywords

Codonopsis lanceolata;gas co-distillation;solvent extraction/fractionation;headspace sampling;GC-retention index