Study of the effects of extraction methods on Argan oil quality through its metal content

Ennoukh, Fatima Ezzahra; Bchitou, Rahma; Mohammed, Faez; Guillaume, Dominique; Harhar, Hicham; Bouhaouss, Ahmed

doi:10.1016/j.indcrop.2017.08.039

Cited by 15 publications

(13 citation statements)

References 11 publications

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“…Tin‐content in the soil of the argan forest is not documented. Nevertheless and highly interestingly, elevated tin‐content in argan oil had been repeatedly observed . However, such particularity has never been emphasized as a possibly useful marker.…”

Section: Resultsmentioning

confidence: 96%

“…However all oils evaluated in the present study had been prepared using similar presses, and only argan oil presented an elevated tin content making the likehood of a press induced tin‐contamination unlikely. Furthermore, cosmetic argan oil, a type of cold‐pressing unroasted kernels presented a low tin content . Also interestingly, solvent‐extracted argan oil presented an even higher tin‐content than press extracted argan oil .…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, cosmetic argan oil, a type of cold‐pressing unroasted kernels presented a low tin content . Also interestingly, solvent‐extracted argan oil presented an even higher tin‐content than press extracted argan oil . Therefore, the possibility of the release of tin by the presses could be definitively discarded.…”

Section: Resultsmentioning

confidence: 99%

“…Vegetables take up metals by absorbing them. Consequently, the presence of metals in vegetable oils is due to both endogenous factors inherent to the plant metabolism, and exogenous factors as the natural soil metal content, air or soil contamination by industrial or agronomic techniques, the oil extraction method and treatment process, and finally materials of packaging and storage . Some vegetables have the ability to absorb and then accumulate certain elements at high concentrations .…”

Section: Introductionmentioning

confidence: 99%

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Tin Content Is a Possible Marker to Discriminate Argan Oil Against Olive, Sesame, Mustard, Corn, Peanut, and Sunflower Oils

Mohammed

Guillaume

Abdulwali³

et al. 2019

Euro J Lipid Sci & Tech

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Argan oil occupies an important position in the pharmaceutical, cosmetic, and food domains. Because of its elevated price, argan oil is subjected to adulteration practices by industrial or commercial actors eager to increase profit margins. Therefore, methods to ascertain argan oil authenticity are actively looked for. The use of argan oil elements as authenticity markers has been evaluated. To identify distinctive markers of argan oil allowing the detection of adulteration, the element content of seven pairs of vegetable edible oils is analyzed by inductively coupled plasma atomic emission spectroscopy (ICP‐AES). For each pair, a plant is grown in Morocco and the other in a different country. Content of 12 metals in the resulting vegetable oil is determined and results are interpreted taking into account the soil element content. This study shows that soil element content frequently influences the oil element content but argan oil, which is necessarily prepared from roasted argan kernels, represents a special case since its tin content is much higher than in any other oils. Tin content is a useful marker to characterize argan oil and can be used to certify its authenticity. Practical Application: Tin content determination can be recommended as a possible specific marker to certify argan oil authenticity. This study demonstrates that such analysis is efficient to differentiate argan oil from six other common edible oils. Element content determination is performed over three consecutive years using inductively coupled plasma atomic emission spectroscopy (ICP‐AES) on seven different pairs of edible oils: argan, olive, sesame, mustard, corn, peanut, and sunflower oils. One member of the pair has been prepared from fruit or seeds grown in Morocco while the other one originated from a far removed location. Depending on the type of oil, differences in element content are observed but, remarkably, argan oil is the only oil presenting an elevated tin content that is confirmed by a bibliography search. Therefore tin content determination can be recommended as an additional method to certify argan oil authenticity.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tin Content Is a Possible Marker to Discriminate Argan Oil Against Olive, Sesame, Mustard, Corn, Peanut, and Sunflower Oils

Mohammed

Guillaume

Abdulwali³

et al. 2019

Euro J Lipid Sci & Tech

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“…Trace element analysis has also been reported as a method to detect argan oil adulteration (Gonzalvez et al, 2010;Mohammed et al, 2013). This area of research is still presently particularly active (Ennoukh et al, 2017). Finally, sensory analysis has been developed to detect adulteration by improper quality argan oil (Matthaüs and Bruehl, 2015).…”

Section: Argan Oilmentioning

confidence: 99%

The argan oil project: going from utopia to reality in 20 years

Charrouf¹,

Guillaume

2018

OCL

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-The "argan oil project" is nowadays considered as an economic success that harmoniously combined sustainable development, integrated research-action and socio-economic progress. Actually, it was a long battle whose main stages are presented here. The main stages of the argan oil project include a detailed chemical study of argan oil in order to certify argan oil quality and establish an official quality norm and obtain a geographic indication, pharmacological analyses to certify cosmetic argan oil safety, and finally a strong desire to develop Moroccan rural areas by implementing women's cooperatives and easing the women's access to education.Keywords: argan oil / edible oil / cosmetic oil / Morocco / field research Résumé -Le projet arganier : 20 ans pour passer de l'utopie à la réalité.. Le « projet arganier » est considéré comme un succès économique qui a mélangé harmonieusement le développement durable, la recherche-action intégrée et le progrès économique et social. En réalité, ce fut une longue bataille dont les principales étapes sont présentées ci-après. Les étapes principales du projet huile d'argan comprennent une étude chimique détaillée de l'huile d'argan pour certifier sa qualité, établir une norme officielle et obtenir une indication géographique protégée, des analyses pharmacologiques certifiant la sécurité de l'huile d'argan et enfin un fort désir de développer les zones rurales marocaines en mettant en place des coopératives de femmes et en facilitant l'accès des femmes à l'éducation.Mots clés : huile d'argan / huile alimentaire / huile cosmétique / Maroc / recherche-action

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