Detection of argan oil adulteration with vegetable oils by high-performance liquid chromatography-evaporative light scattering detection.
Triacylglycerol profiles were selected as indicator of adulteration of argan oils to carry out a rapid screening of samples for the evaluation of authenticity. Triacylglycerols were separated by high-performance liquid chromatography-evaporative light scattering detection. Different peak area ratios were defined to sensitively detect adulteration of argan oil with vegetable oils such as sunflower, soy bean, and olive oil up to the level of 5%. Based on four reference argan oils, mean limits of detection and quantitation were calculated to approximately 0.4% and 1.3%, respectively. Additionally, 19 more argan oil reference samples were analysed by high-performance liquid chromatography-refractive index detection, resulting in highly comparative results. The overall strategy demonstrated a good applicability in practise, and hence a high potential to be transferred to routine laboratories.
Equipe de Génie de l'Environnement et de Biotechnologie, Ecole Nationale des Sciences Appliquées, Université Ibn Zohr, B.P. 1136, Agadir, Morocco.
Rachid
R
Salghi
University of Hohenheim, Institute of Food Chemistry, Garbenstrasse 28, 70599 Stuttgart, Germany.
Wolfgang
W
Armbruster
University of Hohenheim, Institute of Food Chemistry, Garbenstrasse 28, 70599 Stuttgart, Germany. Electronic address: Wolfgang.Schwack@uni-hohenheim.de.
Wolfgang
W
Schwack
D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation / Q000379:methods*; D005506:Food Contamination / Q000032:analysis*; D010938:Plant Oils / Q000032:analysis*; D014280:Triglycerides / Q000032:analysis
D010938:Plant Oils; D014280:Triglycerides; C555574:argan oil
Adulteration; HPLC–ELSD; HPLC–RID; Triacylglycerols; Vegetable oils; Virgin argan oil