NMR-based and chemometric approaches applicable to adulteration studies for assessment of the botanical origin of edible oils

Ravaglia, Luciana Marçal; Pizzotti, Ana Beatriz Coriguazi; Alcantara, Glaucia Braz

doi:10.1007/s13197-018-3485-3

Cited by 17 publications

(12 citation statements)

References 17 publications

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“…The fatty acids ( 4 ) were confirmed specifically based on a triplet at ẟ 0.97 ( 3 J H-H = 7.6 Hz) of a linolenic acid counterpart [ 50 , 55 ]. The presence of this fatty acid chain would be suggested as one of the fatty acid acyl chains that constitute the lipophilic membrane of leaves and plays an integral defensive function in oxireduction processes during biochemical cycles of vegetal.…”

Section: Resultsmentioning

confidence: 99%

High-Resolution Magic Angle Spinning (HR-MAS) NMR-Based Fingerprints Determination in the Medicinal Plant Berberis laurina

et al. 2020

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Berberis laurina (Berberidaceae) is a well-known medicinal plant used in traditional medicine since ancient times; however, it is scarcely studied to a large-scale fingerprint. This work presents a broad-range fingerprints determination through high-resolution magical angle spinning (HR-MAS) nuclear magnetic resonance (NMR) spectroscopy, a well-established flexible analytical method and one of most powerful “omics” platforms. It had been intended to describe a large range of chemical compositions in all plant parts. Beyond that, HR-MAS NMR allowed the direct investigation of botanical material (leaves, stems, and roots) in their natural, unaltered states, preventing molecular changes. The study revealed 17 metabolites, including caffeic acid, and berberine, a remarkable alkaloid from the genus Berberis L. The metabolic pattern changes of the leaves in the course of time were found to be seasonally dependent, probably due to the variability of seasonal and environmental trends. This metabolites overview is of great importance in understanding plant (bio)chemistry and mediating plant survival and is influenceable by interacting environmental means. Moreover, the study will be helpful in medicinal purposes, health sciences, crop evaluations, and genetic and biotechnological research.

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Section: Resultsmentioning

confidence: 99%

High-Resolution Magic Angle Spinning (HR-MAS) NMR-Based Fingerprints Determination in the Medicinal Plant Berberis laurina

et al. 2020

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“…Untargeted metabolomics and chemometrics have recently accelerated the authentication of identity and identification of adulterants by high-throughput profiling ( Ravaglia et al, 2019 ; Wallace et al, 2020 ). Metabolomic methods are becoming more accessible and overcome many of the limitations associated with genomic- and simple biomarker-based techniques ( Simmler et al, 2018 ).…”

Section: Pharmacopeial Plant Preparations and Commercial Medicinal Pl...mentioning

confidence: 99%

Phytochemistry in the Ethnopharmacology of North and Central America

2022

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Traditionally the role of phytochemistry in the ethnopharmacology of North and Central America has been to characterize plant materials so that they can be produced reproducibly for commercial use or to identify active principles in unstudied traditional medicines for drug discovery. With new decolonial objectives coming from Indigenous communities, emphasis has shifted to evaluating the safety and efficacy of traditional medicines and preparations for community use. With new techniques and technologies available, scientific focus has shifted from individual bioactives to more rapid and comprehensive chemical characterizations and polypharmacy of traditional medicines. Untargeted metabolomics and associated statistical treatments have greatly expanded identification of components, improved species and cultivar identification and provided means for identifying multiple activity biomarkers, via chemometric and biochemometric analysis. New integrated techniques are available for identifying multiple active principles and synergists. The recent explosion of information is not without problems that need to be addressed including many unconfirmed tentative identifications of phytochemicals, lack of quantitative testing, superficial chemical activity testing and continuing need for dereplication.

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“…High-resolution NMR techniques based on the acquisition of proton, carbon-13, and phosphorus-31 NMR spectra − have been widely applied for the characterization of different chemical components of olive oils and other vegetable oils. In a recent work, 1 H NMR spectral features of different edible oils produced from Brazil nut, linseed, sesame (toasted and raw), and soybean have been analyzed in terms of different percentages among oleic, palmitic, linoleic, and linolenic acids, which affect the relative intensities of 1 H NMR signals between 1 and 3 ppm. The analysis of 1 H NMR spectral features in combination with statistical multivariate methods was successfully used to discriminate EVOOs produced in different geographic areas , or from different botanic cultivars .…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of Proton NMR Relaxation and Proton NMR Diffusion Measurements to Olive Oil Adulterations with Vegetable Oils

Ancora

Milavec

Gradišek

et al. 2021

J. Agric. Food Chem.

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Olive oils and, in particular, extra-virgin olive oils (EVOOs) are one of the most frauded food. Among the different adulterations of EVOOs, the mixture of high-quality olive oils with vegetable oils is one of the most common in the market. The need for fast and cheap techniques able to detect extra-virgin olive oil adulterations was the main motivation for the present research work based on 1H NMR relaxation and diffusion measurements. In particular, the 1H NMR relaxation times, T 1 and T 2, measured at 2 and 100 MHz on about 60 EVOO samples produced in Italy are compared with those measured on four different vegetable oils, produced from macadamia nuts, linseeds, sunflower seeds, and soybeans. Self-diffusion coefficients on this set of olive oils and vegetable oil samples were measured by means of the 1H NMR diffusion ordered spectroscopy (DOSY) technique, showing that, except for the macadamia oil, other vegetable oils are characterized by an average diffusion coefficient sensibly different from extra-virgin olive oils. Preliminary tests based on both NMR relaxation and diffusometry methods indicate that eventual adulterations of EVOO with linseed oil and macadamia oil are the easiest and the most difficult frauds to be detected, respectively.

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NMR-based and chemometric approaches applicable to adulteration studies for assessment of the botanical origin of edible oils

Cited by 17 publications

References 17 publications

High-Resolution Magic Angle Spinning (HR-MAS) NMR-Based Fingerprints Determination in the Medicinal Plant Berberis laurina

High-Resolution Magic Angle Spinning (HR-MAS) NMR-Based Fingerprints Determination in the Medicinal Plant Berberis laurina

Phytochemistry in the Ethnopharmacology of North and Central America

Sensitivity of Proton NMR Relaxation and Proton NMR Diffusion Measurements to Olive Oil Adulterations with Vegetable Oils

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