On the Usage of the Faraday Effect as an Authentication Technique for Vegetable Oils

Abu-Taha, M. I.; Halasa, M. A.; Abu-Samreh, M. M.

doi:10.4236/jmp.2013.42032

Cited by 9 publications

(6 citation statements)

References 11 publications

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“…The full calibration then presents an interesting area in which students can extend the experiment. Other avenues for extension include attempting to use the Verdet coefficient to detect adulteration of olive oil (similar to another experiment in the literature [29]) or measuring the Verdet coefficient of other fluids.…”

Section: Discussionmentioning

confidence: 99%

Measuring the Faraday effect in olive oil using permanent magnets and Malus’ law

et al. 2020

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We present a simple permanent magnet set-up that can be used to measure the Faraday effect in gases, liquids and solids. By fitting the transmission curve as a function of polarizer angle (Malus' law) we average over fluctuations in the laser intensity and can extract phase shifts as small as ± 50 µrads. We have focused on measuring the Faraday effect in olive oil and find a Verdet coefficient of V = 192 ± 1 deg T −1 m −1 at approximately 20 • C for a wavelength of 659.2 nm. We show that the Verdet coefficient can be fit with a Drude-like dispersion law A/(λ 2 − λ 2 0 ) with coefficients A = 7.9 ± 0.2 × 10 7 deg T −1 m −1 nm 2 and λ 0 = 142 ± 13 nm.

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Section: Discussionmentioning

confidence: 99%

Measuring the Faraday effect in olive oil using permanent magnets and Malus’ law

et al. 2020

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“…Auf diese Messgröße wird durch Anlegen eines bekannten Magnetfeldes rückgeschlossen. Daraus können diverse Eigenschaften des Mediums ermittelt werden [12]. Derartige Anwendungen werden in diesem Beitrag nicht näher untersucht, dennoch gelten die gewonnenen Erkenntnisse auch hierfür.…”

Section: Auswahl Des Sensortypsunclassified

“…Die Anwendung betrifft Materialien mit hohen Verdet-Konstanten, wie beispielsweise Pflanzenöle [25]. Olivenöle lassen sich hierüber unter anderem hinsichtlich ihrer Reinheit oder chemischen Degradation aufgrund von schlechten Lagerungsbedingungen untersuchen [12].…”

Section: Weitere Mögliche Anwendungen Für Faraday-magnetometerunclassified

Komponenten der Messunsicherheit eines Faraday-Magnetometers

Piepgras

Zagar

2022

Elektrotech. Inftech.

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ZusammenfassungIn diesem Beitrag wird ein magneto-optischer Sensor auf Basis des Faraday-Effekts vorgestellt. Hiermit können anhand der Messung einer Komponente der magnetischen Flussdichte zerstörungsfrei und sogar kontaktlos elektrische Stromdichten und Permanentmagnetisierungen bestimmt werden. Aufgrund seiner Bauweise kann der Sensor bis zu $$6\,\upmu\text{m}$$ 6 μ m an das Messobjekt angenähert werden. In der vorgestellten Anwendung sollen magnetische Muster mit Strukturgrößen von $$50\,\upmu\text{m}$$ 50 μ m mit Remanenzen im Bereich 0 mT bis 500 mT auf $$1\,\text{m}\text{T}$$ 1 mT aufgelöst werden. Der Aufbau wird bezüglich seiner Messunsicherheit hinsichtlich dieser Anforderung untersucht. Es soll aber darüber hinaus herausgestellt werden, was allgemein bei der Umsetzung eines Faraday-Magnetometers beachtet werden muss. Dies ermöglicht das Abschätzen des Potenzials für eine große Bandbreite möglicher Anwendungen.

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“…The unique physiological and physico-chemical properties of any vegetable fats and oils depend on the fatty acid composition of their TAG structure. [11,12].…”

Section: Introductionmentioning

confidence: 98%

Determination of the triacylglycerol content for the identification and assessment of purity of shea butter fat, peanut oil, and palm kernel oil using maldi-tof/tof mass spectroscopic technique

Badu

Johannes

2016

International Journal of Food Properties

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This paper reports the rapid screening and identification of the triacylglycerol (TAG) content of shea butter fat, palm kernel oil and peanut oil sold in the local Ghanaian market for their characterization and identification. Samples were dissolved in chloroform with 2,5-dihydroxybenzoic acid (DHB) as the matrix. After subjecting the samples to Maldi-Tof/MS, the spectra obtained showed the characteristic TAGs as sodium adducts. Seven major triacylglycerol species were identified as dipalmitoyl olein (POP), palmitoyl diolein (OOP), palmitoyl stearoyl olein ( POS), linoleoyl dilein (OOL), triolein (OOO), stearoyl diolein (OOS) and distearoyl olein (SOS) in all three samples. Palmitoyl linoleoyl olein (PLO) and tristearin (SSS) were also identified. Oxygenated triacylglycerols and other species from the fragmentation of TAGs were also obtained. The presence of the oxygenated TAGs and the TAG fragments may be as a of poor handling and production processes.

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On the Usage of the Faraday Effect as an Authentication Technique for Vegetable Oils

Cited by 9 publications

References 11 publications

Measuring the Faraday effect in olive oil using permanent magnets and Malus’ law

Measuring the Faraday effect in olive oil using permanent magnets and Malus’ law

Komponenten der Messunsicherheit eines Faraday-Magnetometers

Determination of the triacylglycerol content for the identification and assessment of purity of shea butter fat, peanut oil, and palm kernel oil using maldi-tof/tof mass spectroscopic technique

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