Characterisation of Sclerocarya birrea (marula) seed oil and investigation of the geographical origin by applying similarity calculations, differential NMR and hierarchical cluster analysis.
adulteration
differential NMR
diglycerides
fatty acids
marula seed oil
similarity
Journal
Phytochemical analysis : PCA
ISSN: 1099-1565
Titre abrégé: Phytochem Anal
Pays: England
ID NLM: 9200492
Informations de publication
Date de publication:
Dec 2023
Dec 2023
Historique:
revised:
27
06
2023
received:
17
05
2023
accepted:
29
06
2023
medline:
4
12
2023
pubmed:
29
7
2023
entrez:
29
7
2023
Statut:
ppublish
Résumé
The marula fruit is an important indigenous African fruit since various commercial products are produced from the pulp and the seed oil. The increased demand requires methods for authentication, quality control and determination of geographical origin. The study aimed to establish a fast and reliable method for characterisation and authentication of marula seed oil. Furthermore, to identify marker compounds that can distinguish marula seed oils from other commercial oils and indicate regional differences. Metabolic profiling of 44 commercial marula seed oils was performed using proton nuclear magnetic resonance ( Marula seed oil was found to be similar to macadamia and olive oils and was distinguished from these oils by the detection of minor components. Marula seed oil is differentiated from the other two oils by the absence of α-linolenic acid, relatively high levels of monoglycerides and diglycerides, and an approximately 1:1 ratio of 1,2- and 1,3-diglycerides. When comparing marula seed oils from various regions using hierarchical cluster analysis, clustering of the marula seed oils from Namibia and Zimbabwe was observed and was related to the quantities of linoleic acid and monoglycerides and diglycerides. Some samples displayed deviations in their composition which might indicate adulteration or contamination during the production process. The study demonstrates the potential of NMR as a tool in the quality control of marula seed oil. This technique requires very little sample preparation, circumvents derivatisation of the oil components with fast run-times. In addition, samples with chemical profiles that differ from the general signature profile can easily be identified.
Substances chimiques
Plant Oils
0
Diglycerides
0
Monoglycerides
0
Olive Oil
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
959-969Subventions
Organisme : National Research Foundation of South Africa (DST-NRF SARChI programme)
Organisme : South African Medical Research Council (SAMRC)
Organisme : Conselho Nacional de Pesquisa do Brazil (CNPq)
Organisme : Fundação de Apoio a Pesquisa do Estado do Rio de Janeiro (FAPERJ)
Informations de copyright
© 2023 The Authors. Phytochemical Analysis published by John Wiley & Sons Ltd.
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