Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Chemical characterisation of South African olive oil
Thesis (MSc)--Stellenbosch University, 2025.
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Stellenbosch : Stellenbosch University
2025
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613739860099072 |
|---|---|
| access_status_str | Open Access |
| author | Weightman, Michael William |
| author2 | De Villiers, Andre J. |
| author_browse | De Villiers, Andre J. Weightman, Michael William |
| author_facet | De Villiers, Andre J. Weightman, Michael William |
| author_sort | Weightman, Michael William |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MSc)--Stellenbosch University, 2025. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/132301 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:40:56.191Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/132301 Chemical characterisation of South African olive oil Weightman, Michael William De Villiers, Andre J. Stellenbosch University. Faculty of Science. Dept. of Chemistry & Polymer Science. Olive oil -- Analysis -- South Africa Phenols Olive oil -- Composition -- South Africa Olive oil -- Sensory evaluation Chromatographic analysis -- Technique UCTD Thesis (MSc)--Stellenbosch University, 2025. Weightman, M. W. 2025. Chemical characterisation of South African olive oil. Unpublished masters thesis. Stellenbosch: Stellenbosch University [online]. Available: https://scholar.sun.ac.za/items/07dab742-fcce-4397-bc4e-d991242740e2 ENGLISH ABSTRACT: The phenolic and volatile aroma compounds of olive oil are responsible for some of the organoleptic and health attributes of the product coveted by consumers worldwide. As a result, the chemical characterisation of olive oil has become a major field of research in the primary olive oil producing countries. South Africa is part of the emerging market of olive oil producers, with the industry experiencing rapid growth in recent years. Despite a thriving local industry, very little information is available on the chemical composition of South African olive oil. In the present work liquid chromatographic (LC) and comprehensive two-dimensional gas chromatographic (GC×GC) methods hyphenated to high resolution mass spectrometric (HR-MS) detection were developed for the analysis of phenolic constituents and volatile aroma compounds, respectively, in South African olive oil. LC-MS allowed the tentative identification of 55 phenolic compounds across 12 extra virgin olive oil (EVOO) samples of four cultivars, including an oleuropein aglycone dimer not previously reported in the literature. Furthermore, 167 volatile aroma compounds were tentatively identified in seven EVOO samples using headspace solid phase microextraction HS-SPME in combination with GC×GC-HR-MS. Unsupervised multivariate statistical analysis of the acquired semi-quantitative chemical composition data was performed. From the phenolic compound data, tentative associations could be made between phenolic content and geographical origin of the analysed EVOO samples. Additionally, the volatile data allowed for the clear differentiation of rancid and faultless oils. The statistical findings presented in this thesis, while preliminary, show promise for future use in geographical prediction and quality control, and should inform further research into the chemical composition of South African olive oils. AFRIKAANSE OPSOMMING: Geen opsomming beskikbaar. Masters 2025-06-03T07:56:39Z 2025-06-03T07:56:39Z 2025-03 Thesis https://scholar.sun.ac.za/handle/10019.1/132301 en Stellenbosch University viii, 89 pages : illustrations, maps application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Olive oil -- Analysis -- South Africa Phenols Olive oil -- Composition -- South Africa Olive oil -- Sensory evaluation Chromatographic analysis -- Technique UCTD Weightman, Michael William Chemical characterisation of South African olive oil |
| title | Chemical characterisation of South African olive oil |
| title_full | Chemical characterisation of South African olive oil |
| title_fullStr | Chemical characterisation of South African olive oil |
| title_full_unstemmed | Chemical characterisation of South African olive oil |
| title_short | Chemical characterisation of South African olive oil |
| title_sort | chemical characterisation of south african olive oil |
| topic | Olive oil -- Analysis -- South Africa Phenols Olive oil -- Composition -- South Africa Olive oil -- Sensory evaluation Chromatographic analysis -- Technique UCTD |
| url | https://scholar.sun.ac.za/handle/10019.1/132301 |
| work_keys_str_mv | AT weightmanmichaelwilliam chemicalcharacterisationofsouthafricanoliveoil |