ESSENTIAL OILS OBTAINED FROM EUCALYPTUS AND CYMBOPOGON LEAVES BY STEAM DISTILLATION FOR MAKING NATURAL MIXTURE HAVING EFFECT AS A MOSQUITO REPELLENT
Abstract-HCTN7. Natural essential oils of plant have been applied over the world becausef these biosafety natural compounds. Applicant levels from the steaming pot among the common people to the raw essential oils or pure extract essence from original natural sources for making special products. Eucalyptus essential oil obtains from Eucalyptus leaves contain 998 mg/L α-eucalyptol, Cymbopogon essential oil obtains from lemon grasses contain 64,8% citral. These essential oils have been paid attention because of there were abundant raw materials in the Mekong Delta area. Therefore, the study was conducted to aim of extracting essential oils from Eucalyptus and Cymbopogon leaves as well as examminate their effect on mosquito repellent. The factors affecting the amount of extracted oils are the time to withered materials (0 h; 2.5 h; 5 h), how the way to preliminary treatment of the materials (crushing or without crushing), the distilled water aidding (400 mL, 500 mL, 600 mL)/300g materials, the distillation time (2 h; 2.5 h; 3 h). The data was evaluated by statistical program. Mixing ratio of Cymbopogon oil: Eucalyptus oil: coconut oil, one of the important criteria to be investigated for evaluating the ability to repel mosquitoes is in turn (40:10:50), (35:15:50), (30:20:50). Experimental results reveal that crushing (Cymbopogon), without crushing (Eucalyptus) of fresh materials, 500 mL of distilled water aidding, 3 h of distillation time were the best during the oil extraction process. The contents of mixing formula of the Cymbopogon essiential oil: Eucalyptus essiential oil: coconut oil (40: 10: 50) is the most effective with the ability to falling mosquitoes only after 5 minutes and killing 84.67% mosquitoes after 24 hours. The natural mixture of Cymbopogon oil, Eucalyptus oil, and coconut oil, safety for human health and more friendly to the environment.
Keywords: Coconut oil, Eucalyptus essential oil, Eucalyptus leaves, Cymbopogon essential oil, Cymbopogon leaves, mosquito repellent, steam distillation.
Guenther, E. -The Essential Oils, Vol.l, Robert E. Kreiger Publishing Co., New York,1972.
Võ Kim Thành., Đỗ Thị Triệu Hải. - Nghiên cứu chiết tách và xác định thành phần hoá học tinh dầu củ riềng ở Hội An, Quảng Nam. Tạp chí Khoa học và Công nghệ, Đại Học Đà Nẵng, Số 5(40) (2010).
Authors who publish with Vietnam Journal of Science and Technology agree with the following terms:
- The manuscript is not under consideration for publication elsewhere. When a manuscript is accepted for publication, the author agrees to automatic transfer of the copyright to the editorial office.
- The manuscript should not be published elsewhere in any language without the consent of the copyright holders. Authors have the right to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal’s published version of their work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are encouraged to post their work online (e.g., in institutional repositories or on their websites) prior to or during the submission process, as it can lead to productive exchanges or/and greater number of citation to the to-be-published work (See The Effect of Open Access).