Characterization of lipid compositions, minor components and antioxidant capacities in macadamia (Macadamia integrifolia) oil from four major areas in China

Xixiang Shuai, Taotao Dai, Mingshun Chen, Cheng mei Liu, Roger Ruan, Yuhuan Liu, Jun Chen

Research output: Contribution to journalArticlepeer-review

Abstract

Macadamia is rich in lipids and considered as a source of high-quality oil. In this study, fatty acids, triacylglycerols, minor components and antioxidant activities of macadamia oils (MOs) from four cultivated regions (YN: Yunnan Province; GZ: Guizhou Province; GX: Guangxi Province; GD: Guangdong Province) in China were systematically analyzed by modern chromatography (Gas chromatography, high performance liquid chromatography, inductively coupled plasma mass spectrometry and ultraviolet spectroscopy). The analysis indicated macadamia oil enriched in unsaturated fatty acids (UFA), including 62.4%–65.6% oleic acid and 11.4%–17.3% palmitoleic acid. Among the four cultivated regions, the MO from YN exhibited the highest contents of UFA (85.0%) and palmitoleic acid. In addition, the minor components and antioxidant activities of MO from four cultivation areas showed a significant difference, which GX-MO had the highest contents of α-tocotrienols (58.9 mg/kg) and phytosterols (2310.4 mg/kg), while GZ-MO was rich in squalene (626.7 mg/kg) and YN-MO had the highest levels of polyphenols (71.0 mg GAE/kg) and antioxidant capacity. Based on the correlation analysis, the polyphenols and α-tocotrienols had a remarkable contribution on the antioxidant activities of MO. Furthermore, the cultivation areas of MO can be distinguished according to the analysis of hierachical cluster analysis and principal components. Our studies offer a potential guidance for the identification of MO and its application in food industry.

Original languageEnglish (US)
Article number102009
JournalFood Bioscience
Volume50
DOIs
StatePublished - Dec 2022
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by National Natural Science Foundation, China (Grant No. 32160572 , 32101948 ), China Postdoctoral Science Foundation , China (Grant No. 2020M6832211 ), Natural Science Foundation of Hainan Province (Grant No. 320QN320 ) and Postdoctoral Foundation of Guangxi Academy of Agricultural Sciences (Grant No. 2020037 ).

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

  • Antioxidant activities
  • Cluster analysis
  • Cultivation areas
  • Macadamia oil
  • Minor components

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