Health & Environmental Research Online (HERO)


Print Feedback Export to File
5238747 
Journal Article 
ATR-FTIR Study of Thyme and Rosemary Oils Extracted by Supercritical Carbon Dioxide 
Topala, CM; Tataru, LD 
2016 
1 
Revista de Chimie
ISSN: 0034-7752
EISSN: 2668-8212 
Syscom 18 SRL 
67 
5 
842-846 
English 
WOS:000378158100005 
Thyme and rosemary are the herb plants which essential oil has demonstrated antiseptic and antiviral properties. Plant-derived polyphenols receive considerable attention because of their potential antioxidant and antimicrobial properties. The essential oils obtained from Saturenja hortensis (the cultivated variety of thyme) and from Rosmarinus officinalis were studied using ATR-FTIR spectroscopy. Supercritical fluid extraction (SFE) with supercritical carbon dioxide (CO2) has recently gained in importance as an alternative to the classical procedures (steam distillation and extraction with organic solvents) because of legal limits regarding solvent residues. In conventional methods high temperatures is used, which can cause chemical modifications in the oil components and often a loss of the most volatile molecules. The extraction processes with carbon dioxide were compared to extraction processes with n-hexane. The extracts with CO2 were obtained by supercritical carbon dioxide at 40oC and pressures of 10 MPa. The vibrational spectra obtained for essential oil from the Supercritical fluid extraction (SFE) present characteristic key bands of the main individual volatile components (e.g. carvacrol, thymol, p-cymene, α-pinene, 1,8-cineole). 
supercritical extraction; thymol; thyme oil; rosemary oil; Attenuated Total Reflexion