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Chemical variability in volatile oils of Bentong ginger: A chemometric study / Farah Syuhaidah Ahmad Jahiddin

The volatile oil of ginger (Zingiber officinale) possesses various pharmacological properties corresponding to its chemical compositions, which in turn, depends on its source material and preparation method. In this study, preliminary experiments were carried out to investigate the variations in vol...

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Main Author: Farah Syuhaidah , Ahmad Jahiddin
Format: Thesis
Published: 2020
Subjects:
Q Science (General)
QD Chemistry
Online Access:http://studentsrepo.um.edu.my/12206/2/Farah_Syuhaidah.pdf
http://studentsrepo.um.edu.my/12206/1/Farah_Syuhaidah.pdf
http://studentsrepo.um.edu.my/12206/
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spelling my.um.stud.122062021-07-26T21:31:17Z Chemical variability in volatile oils of Bentong ginger: A chemometric study / Farah Syuhaidah Ahmad Jahiddin Farah Syuhaidah , Ahmad Jahiddin Q Science (General) QD Chemistry The volatile oil of ginger (Zingiber officinale) possesses various pharmacological properties corresponding to its chemical compositions, which in turn, depends on its source material and preparation method. In this study, preliminary experiments were carried out to investigate the variations in volatile oil of ginger prepared based on different method (dry/fresh samples), extraction duration and size reduction process (grate/slice samples). The ginger volatile oil yield can be quantitatively improved by using a fresh sample with grated form and a longer extraction cycle. Gas Chromatography-Mass Spectrometry (GC-MS) was conducted and the chromatogram profile was subjected to Principal Component Analysis (PCA). Results show that extract of fresh samples was predominated by the presence of monoterpenes while sesquiterpenes were more profound in the grated samples; meanwhile, the extraction duration demonstrated a direct and inverse relationship on monoterpenes and sesquiterpenes. As the optimum extraction procedure has been determined, the variability in the volatile components was further explored using pattern recognition tools. The results revealed a tendency for the volatile oil components to cluster, probably due to the geographic origin of the ginger material, therefore highlighting that the terpene components in Bentong ginger could be used to differentiate it from other commercial gingers. The overall findings demonstrate that different sample preparation methods and geographical origin will affect the quantity and/or quality of ginger extract obtained. 2020-07 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/12206/2/Farah_Syuhaidah.pdf application/pdf http://studentsrepo.um.edu.my/12206/1/Farah_Syuhaidah.pdf Farah Syuhaidah , Ahmad Jahiddin (2020) Chemical variability in volatile oils of Bentong ginger: A chemometric study / Farah Syuhaidah Ahmad Jahiddin. Masters thesis, University of Malaya. http://studentsrepo.um.edu.my/12206/
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Student Repository
url_provider http://studentsrepo.um.edu.my/
topic Q Science (General)
QD Chemistry
spellingShingle Q Science (General)
QD Chemistry
Farah Syuhaidah , Ahmad Jahiddin
Chemical variability in volatile oils of Bentong ginger: A chemometric study / Farah Syuhaidah Ahmad Jahiddin
description The volatile oil of ginger (Zingiber officinale) possesses various pharmacological properties corresponding to its chemical compositions, which in turn, depends on its source material and preparation method. In this study, preliminary experiments were carried out to investigate the variations in volatile oil of ginger prepared based on different method (dry/fresh samples), extraction duration and size reduction process (grate/slice samples). The ginger volatile oil yield can be quantitatively improved by using a fresh sample with grated form and a longer extraction cycle. Gas Chromatography-Mass Spectrometry (GC-MS) was conducted and the chromatogram profile was subjected to Principal Component Analysis (PCA). Results show that extract of fresh samples was predominated by the presence of monoterpenes while sesquiterpenes were more profound in the grated samples; meanwhile, the extraction duration demonstrated a direct and inverse relationship on monoterpenes and sesquiterpenes. As the optimum extraction procedure has been determined, the variability in the volatile components was further explored using pattern recognition tools. The results revealed a tendency for the volatile oil components to cluster, probably due to the geographic origin of the ginger material, therefore highlighting that the terpene components in Bentong ginger could be used to differentiate it from other commercial gingers. The overall findings demonstrate that different sample preparation methods and geographical origin will affect the quantity and/or quality of ginger extract obtained.
format Thesis
author Farah Syuhaidah , Ahmad Jahiddin
author_facet Farah Syuhaidah , Ahmad Jahiddin
author_sort Farah Syuhaidah , Ahmad Jahiddin
title Chemical variability in volatile oils of Bentong ginger: A chemometric study / Farah Syuhaidah Ahmad Jahiddin
title_short Chemical variability in volatile oils of Bentong ginger: A chemometric study / Farah Syuhaidah Ahmad Jahiddin
title_full Chemical variability in volatile oils of Bentong ginger: A chemometric study / Farah Syuhaidah Ahmad Jahiddin
title_fullStr Chemical variability in volatile oils of Bentong ginger: A chemometric study / Farah Syuhaidah Ahmad Jahiddin
title_full_unstemmed Chemical variability in volatile oils of Bentong ginger: A chemometric study / Farah Syuhaidah Ahmad Jahiddin
title_sort chemical variability in volatile oils of bentong ginger: a chemometric study / farah syuhaidah ahmad jahiddin
publishDate 2020
url http://studentsrepo.um.edu.my/12206/2/Farah_Syuhaidah.pdf
http://studentsrepo.um.edu.my/12206/1/Farah_Syuhaidah.pdf
http://studentsrepo.um.edu.my/12206/
_version_ 1738506582297149440
score 13.211869

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