A New Method for Olive Oil Screening Using Multivariate Analysis of Proton NMR Spectra

Ray, Colleen L.; Gawenis, James A.; Greenlief, C. Michael

doi:10.3390/molecules27010213

Cited by 15 publications

(6 citation statements)

References 11 publications

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“…It was reported that Near Infrared (NIR) and chemometric techniques have shown 1-10% detection level of adulteration with vegetable oils only when a statistical model is used (Vanstone et al, 2018). In another study carried out by using P-NMR for principle component analysis, detection of seed oil adulteration levels was 5-20% based on type of seed oil (Ray et al, 2021). Green et al (2020) employed U-HPLC with charged aerosol detection to characterise EVOO along with potential adulterant oils based on their triacylglycerol profiles.…”

Section: Dpv Analysis Of Oil Mixturesmentioning

confidence: 99%

Detection of adulteration in cold‐pressed olive oil by voltammetric analysis of alpha‐tocopherol on single‐use pencil graphite electrode

Karagözlü,

Adun,

Ozsoz

et al. 2024

Int J of Food Sci Tech

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SummaryA quick, simple, environmentally friendly and cost‐effective screening approach for identifying parameters of adulteration in cold‐pressed olive oil (CPOO) was developed. The technique focused on the electrochemical examination of the peak of alpha‐tocopherol oxidation on pencil graphite electrode (PGE). Rapeseed oil (RO), sunflower oil (SO), and corn oil (CO) were added to local CPOO in varying amounts, and the mixtures were then tested by differential pulse voltammetry (DPV) on PGE. Voltammetric analysis of CPOO and its artificially created mixtures with other commercial oils have demonstrated statistically significant discrimination with an ability to detect adulteration under the level of 10% on weight basis. The method's relative standard deviation (RSD) was 20%, and the α‐tocopherol in CPOO cut‐off value was 30.98 ± 12.57 nA. As far as our knowledge, no data on utilisation of voltammetric techniques for the detection of olive oil adulteration are available to date by using PGE. The results showed that the developed method is capable of detection of adulteration in natural olive oils without any pretreatment.

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Section: Dpv Analysis Of Oil Mixturesmentioning

confidence: 99%

Detection of adulteration in cold‐pressed olive oil by voltammetric analysis of alpha‐tocopherol on single‐use pencil graphite electrode

Karagözlü,

Adun,

Ozsoz

et al. 2024

Int J of Food Sci Tech

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“…W innym badaniu analizowano dwadzieścia osiem oliw z oliwek [34]. W tym celu poddano analizie 1 H NMR dziesięć olejów z nasion oraz siedem jednogatunkowych i mieszanych oliw EVOO w celu zbadania oliw fałszowanych innymi olejami.…”

Section: Typy Zafałszowań Oliwy Z Oliwekunclassified

1h NMR Jako Narzędzie Do Oceny Jakości Olejów Roślinnych

SŁOMCZYŃSKA,

SIUDEM,

PARADOWSKA

2024

zntj

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Background. Vegetable oils play an important role in the food, pharmaceutical and cosmetic indus tries. They are not only a source of nutrients, but also a carrier of bioactive substances as an ingredient of creams or emulsions. Some oils, like extra virgin olive oil or argan oil, due to high consumer demand and high prices, may be subject to adulteration by using cheaper and easily accessible oils. Hence, the need to develop new research methods enabling the quick identification of such adulterations, but also enabling the assessment of oil quality, e.g. in variable storage conditions. Typically, gas chromatography (GC) is used to assess the profile of fatty acids. Oil parameters such as acid number, peroxide value and iodine number are also assessed to determine oil quality. Nevertheless, instead of performing all the above mentioned tests, these parameters can also be determined directly from 1H NMR spectra. Hence, there is great potential for using this method in quick screening of oil quality. The 1H NMR technique has been growing in importance in recent years in researching the quality and composition of food, including vege table oils. Multidimensional NMR techniques and analysis of other nuclei (13C NMR) are also used in the study of oils. The aim of this work is to present the applications of the most commonly used 1H NMR technique. Results and Conclusions. The article contains examples of the application of this method in testing the composition, quality and authenticity of olive oil, hemp oil and argan oil as oils used (both in the food, medical or cosmetic context) and becoming more and more popular among consumers.

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“…There is no literature on this specific analysis conducted with other species of tree ferns, but other studies conducted with olive oil and plant extracts highlight the importance of this analysis (Rohman et al 2020;Ray et al 2022). The ease of sample preparation, quick analysis, and easily interpretable results make this method a valuable tool for detecting fraud through substitution or dilution of plant extracts compared to other methods (Stoyanova & Brown 2001;Ray et al 2022).…”

Section: Screening By 1 H Nmr Of the Crude Leaves Extracts And Their ...mentioning

confidence: 99%

Phytochemical screening of the Dicksonia sellowiana leaves and its structures

Oliveira,

Fernandes

et al. 2023

Rodriguésia

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Dicksonia sellowiana (Dicksoniaceae) is a tree fern characteristic of the mixed ombrophilous forests of southern Brazil in the Atlantic Forest. Due to its extensive use in the past for making garden pots, this species is at risk of extinction. The objective of this study was to evaluate the phytochemical composition of D. sellowiana leaves and their structures and correlate it with their antioxidant potential. Measurements of moisture content, extraction yield, preliminary phytochemical analysis, chemometric analysis by 1H NMR PCA, UPLC-PDA-MS analysis, total polyphenol content, and antioxidant activity were conducted on the leaves and their structures. The phytochemical composition confirmed the presence of polyphenols, including tannins and flavonoids (derived from kaempferol), with higher concentrations in the pinna and lower in the rachis. The pinnule exhibits high diversity and concentration of phytochemical compounds, which justify its antioxidant activity due to the presence of polyphenols. In conclusion, this study highlights that the pinnae and leaves of D. sellowiana exhibit a similar and more diverse phytochemical composition compared to the other evaluated structures, showing higher concentrations of polyphenols and antioxidant activity. The results reinforce the preservation of the endangered species and its potential as a resource for pharmacological and nutritional phytochemical compounds.

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A New Method for Olive Oil Screening Using Multivariate Analysis of Proton NMR Spectra

Cited by 15 publications

References 11 publications

Detection of adulteration in cold‐pressed olive oil by voltammetric analysis of alpha‐tocopherol on single‐use pencil graphite electrode

Detection of adulteration in cold‐pressed olive oil by voltammetric analysis of alpha‐tocopherol on single‐use pencil graphite electrode

1h NMR Jako Narzędzie Do Oceny Jakości Olejów Roślinnych

Phytochemical screening of the Dicksonia sellowiana leaves and its structures

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