基于核磁共振和化学计量学的方法适用于掺假研究，以评估食用油的植物来源。
NMR-based and chemometric approaches applicable to adulteration studies for assessment of the botanical origin of edible oils.
作者信息
Ravaglia Luciana Marçal, Pizzotti Ana Beatriz Coriguazi, Alcantara Glaucia Braz
机构信息
Instituto de Química, Universidade Federal de Mato Grosso do Sul, Av. Filinto Müller, 1555, CP 549, Campo Grande, MS 79074-460 Brazil.
出版信息
J Food Sci Technol. 2019 Jan;56(1):507-511. doi: 10.1007/s13197-018-3485-3. Epub 2018 Dec 4.
Abstract
The health benefits of edible oils, especially promoted by ω3 and ω9 fatty acids, have been associated with their botanical origin. In order to investigate fatty acid profiles, we assessed Brazil nut, chia, linseed, sesame (toasted and raw), and soybean oils by H nuclear magnetic resonance (H NMR) and chemometrics. PCA plots revealed important relationships between chemical composition and botanical origin for reference and commercial samples. Strong evidence of commercial Brazil nut oil adulteration was confirmed using a spiking procedure. Our findings show that NMR and chemometrics are successful tools for correlating fatty acid profile with botanical origin, which can be suitable for detecting sample adulteration.
摘要
食用油的健康益处，尤其是由ω3和ω9脂肪酸所带来的，与它们的植物来源有关。为了研究脂肪酸谱，我们通过氢核磁共振（H NMR）和化学计量学对巴西坚果油、奇亚籽油、亚麻籽油、芝麻（烤过的和生的）油以及大豆油进行了评估。主成分分析（PCA）图揭示了参考样品和商业样品的化学成分与植物来源之间的重要关系。通过加标程序证实了商业巴西坚果油掺假的有力证据。我们的研究结果表明，核磁共振和化学计量学是将脂肪酸谱与植物来源相关联的成功工具，适用于检测样品掺假。
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