Effect of drying method on the volatiles in bay leaf (Laurus nobilis L.).
The effect of different drying treatments on the volatiles in bay leaf (Laurus nobilis L.) was studied. Simultaneous distillation extraction (SDE) and solid-phase microextraction (SPME) were compared by gas chromatography-mass spectrometry (GC-MS) of the volatile components in bay leaves. SDE yielded better quantitative analysis results. Four drying treatments were employed: air-drying at ambient temperature, oven-drying at 45 degrees C, freezing, and freeze-drying. Oven drying at 45 degrees C and air-drying at ambient temperature produced quite similar results and caused hardly any loss in volatiles as compared to the fresh herb, whereas freezing and freeze-drying brought about substantial losses in bay leaf aroma and led to increases in the concentration levels of certain components, e.g., eugenol, elemicin, spathulenol, and beta-eudesmol.
Díaz-Maroto
M Consuelo
MC
Area de Tecnología de los Alimentos, Facultad de Ciencias Químicas (UCLM), Campus Universitario, s/n, 13071 Ciudad Real, Spain. mcdiaz@qata-cr.uclm.es
Pérez-Coello
M Soledad
MS
Cabezudo
M Dolores
MD
D003890:Desiccation / Q000379:methods*; D005054:Eugenol / Q000032:analysis; D005612:Freeze Drying; D005615:Freezing; D008401:Gas Chromatography-Mass Spectrometry; D006358:Hot Temperature; D027442:Laurus / Q000737:chemistry*; D009812:Odorants; D011748:Pyrogallol / Q000031:analogs & derivatives* / Q000032:analysis; D012717:Sesquiterpenes / Q000032:analysis; D045787:Sesquiterpenes, Eudesmane; D013729:Terpenes / Q000032:analysis; D014835:Volatilization
D012717:Sesquiterpenes; D045787:Sesquiterpenes, Eudesmane; D013729:Terpenes; D011748:Pyrogallol; D005054:Eugenol; C051082:beta-eudesmol; C002135:elemicin; C013258:spathulenol