Unlocking the Secrets of Terminalia Kernels Using Near-Infrared Reflectance Spectroscopy

Unlocking the Secrets of Terminalia Kernels Using Near-Infrared Reflectance Spectroscopy

Applied Spectroscopy

  • Author(s): Bobasa, Eshetu M., Netzel, Michael E., Phan, Ahn Dao Thi, Smyth, Heather, Sultanbawa, Yasmina, Cozzolino, Daniel
  • Published: 2021
  • Publisher: SAGE Publications Ltd STM
  • ISBN: 0003-7028

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Abstract: In recent years, the native food industry in Australia has increased in both value and volume due to the discovery of a wide range of phytochemicals (e.g. vitamin C, polyphenols) that have potential health benefits. Thus, plant organs and tissues of these native plants are used in a wide range of applications. In particular, the kernel of a native plum, the Kakadu plum (Terminalia ferdinandiana, Combretaceae) is considered to be rich in lipids and other phytochemical compounds. The aim of this study was to evaluate the use of NIR spectroscopy to analyse and characterise kernel samples and tissues of wild harvest fruit samples. The FT-NIR reflectance spectra of cracked kernels, seeds cover tissues, and dry powder Kakadu plum kernels were acquired. Both principal component analysis and partial least squares discriminat analysis were used to analsye and interpret the spectral data. A correct classification rate of 93%, 86% and 80% was achieved for the identification of kernel provenance using all tissues, seed coats and the whole nuts, respectively. The results of this study reported for the first time the analysis of Kakadu plum kernels and their tissues using NIR spectroscopy.

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