Microwave assisted hydro-distillation of essential oils from fresh ginger root (Zingiber officinale Roscoe)

Racoti, Anca; Buttress, A.J.; Binner, Eleanor; Dodds, Chris; Trifan, Adrian; Calinescu, Ioan

Abstract

A solvent free in situ microwave hydro-distillation method for extraction of essential oil from fresh ginger root it presented. Extraction was conducted in a TE10n single-mode microwave cavity and variable power 2 kW generator operating at 2.45GHz. The main extracted components identified by gas chromatography (GC) were Zingiberene, ?-Curcumene, ?-Sesquiphellandrene and ?-Selinene. At energy inputs of 0.40 kWh/kg higher powers and shorter exposure times, crucially did not degrade the highly volatile components (?-Pinene and Camphene) despite providing the highest essential oil yields. Optimum processing conditions were found to be 1000W (0.40kWh/kg) for 5 min, for whole ginger root, where 0.35g oil/100g plant was obtained. This was compared to a yield of 0.2g/100g plant in 150 min in using conventional hydro-distillation and 0.3g/100g plant in 90 min using a multi-mode microwave cavity-based hydro-distillation.

Citation

Racoti, A., Buttress, A., Binner, E., Dodds, C., Trifan, A., & Calinescu, I. (2017). Microwave assisted hydro-distillation of essential oils from fresh ginger root (Zingiber officinale Roscoe). Journal of Essential Oil Research, https://doi.org/10.1080/10412905.2017.1360216

• Journal Article Type: Article
• Acceptance Date: Jul 19, 2017
• Publication Date: Aug 17, 2017
• Deposit Date: Aug 30, 2017
• Publicly Available Date: Aug 18, 2018
• Journal: Journal of Essential Oil Research
• Print ISSN: 1041-2905
• Electronic ISSN: 1041-2905
• Publisher: Taylor & Francis Open
• Peer Reviewed: Peer Reviewed
• DOI: https://doi.org/10.1080/10412905.2017.1360216
• Keywords: Ginger essential oil, microwave assisted extraction, solvent free, GC
• Public URL: https://nottingham-repository.worktribe.com/output/878259
• Publisher URL: http://www.tandfonline.com/doi/full/10.1080/10412905.2017.1360216