Near-infrared spectroscopy and chemometrics for rapid profiling of plant secondary metabolites
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Ntebogeng S. Mokgalaka
Abstract
In this study, near-infrared (NIR) spectroscopy, in combination with chemometrics, was used as a rapid tool for determining if exposure to contamination from mine tailings influences the matrices of the specimens, compared to those from natural populations. Principal component analysis (PCA) plots were made from the chemometric models obtained to establish if season of harvest, geographical origin, and level of soil contamination play a determining role in the chemical profiles of the individual specimens harvested from mine sites or natural populations. The random distribution on PCA score plots corroborated the intraspecies variation of Lippia scaberrima previously observed by gas chromatography-flame ionization detection (GC-FID) and gas chromatography-mass spectrometry (GC-MS) essential oil profiles. Clustering according to the season and origin of the individual plants confirmed that the geographic location and the season of harvest influence the chemical profiles of L. scaberrima. The NIR data could not be correlated with the level of soil contamination to which the specimens were exposed. The PCA scores and loadings plots obtained from NIR data of Searsia pendulina suggest that the species is tolerant to pollution from mine tailings. Although separation was obtained in a three-component PCA model between specimens sampled during different seasons, some clustering was observed by specimens from the same geographical origin.
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Artikel in diesem Heft
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Artikel in diesem Heft
- Preface
- Polymeric sorbents for removal of Cr(VI) from environmental samples
- Effects of ZnO nanoparticles in alfalfa, tomato, and cucumber at the germination stage: Root development and X-ray absorption spectroscopy studies
- Source apportionment of polycyclic aromatic hydrocarbons in sediments from polluted rivers
- Near-infrared spectroscopy and chemometrics for rapid profiling of plant secondary metabolites
- Adsorption of radiocesium from aqueous solution using chemically modified pine cone powder
- Sustainable analytical chemistry—more than just being green
- Departure from local thermal equilibrium during ICP-AES and FAES: Characterization in terms of collisional radiative recombination activation energy
- Chemical speciation of environmentally significant metals with inorganic ligands. Part 5: The Zn2+ + OH-, Cl-, CO32-, SO42-, and PO43- systems (IUPAC Technical Report)
