The Effect of Drying Methods on the Chemical Composition of the Essential Oil of Caesalpinia Pulcherrima Growing in Lagos, Nigeria
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Date
2016
Authors
Njoku, I.S.
Asekun, O.T.
Familoni, O.B.
Journal Title
Journal ISSN
Volume Title
Publisher
journals.covenantuniversity.edu.ng
Abstract
This research studied the effects of different drying methods on the yield
and chemical composition of hydrodistilled essential oil from the red variety of
leaves of Caesalpinia pulcherrima. A total of 26, 23, 30 and 25 compounds were
identified in the oils of the fresh, air-dried, sun-dried and oven-dried plant
materials, respectively. In general, the air-dried plant yielded more essential oils
than the fresh, sun-dried and oven-dried plant. The air-dried, sun-dried and ovendried plant materials yielded 0.90 %, 0.20 % and 0.58 % of the essential oils,
respectively whereas the fresh plant materials yielded oils of 0.63 %. The essential
oils of Caesalpinia pulcherrima were composed mainly of sesquiterpenoids. The
fresh leaf oil comprises caryophyllene, 15.51 %; α-cadinol 14.36 %; γ–muurolene,
13.28 %; nerolidol 8.32 % as the most prominent components. While, the major
components common to the different drying methods are air-dried; (phytol, 12.28
%; copaene, 9.07 %; γ-pyronene, 8.95 %; neryl propanoate, 6.55 %), sun-dried
(neryl propanoate, 8.18 %; copaene, 5.49 %; phytol, 4.72 %; γ-pyronene, 0.87 %),
oven-dried (copaene, 18.77 %; neryl propanoate, 7.61 %; γ-pyronene, 4.59 %;
phytol - 3.25 %). This results showed that similar major compounds were present
in all the dried leaf oils but at varying quantities, whereas, they all differ from the
major compounds of the fresh leaf oil. This disparity may be due to chemical
transformation of the components in the different environments exposed to for
moisture removal.
Description
Keywords
Research Subject Categories::NATURAL SCIENCES::Chemistry::Organic chemistry::Bioorganic chemistry , Caesalpinia pulcherrima , Leaf oil , Sesquiterpene , Phytol , Copaene , γPyronene
Citation
NjokuIsaac, S., Asekun Olayinka, T., & Familoni Oluwole, I. The Effect of Drying Methods on the Chemical Composition of the Essential Oil of Caesalpinia Pulcherrima Growing in Lagos, Nigeria.