Solid-phase extraction of phytosterols from rapeseed oil deodorizer
distillates with magnetic graphene oxide nanocomposite
Abstract
A fast and facile method was employed for the synthesis of magnetic
graphene oxide (MGO). The synthesized MGO is characterized by different
techniques and used as a solid-phase adsorbent for the extraction of
β-sitosterol from rapeseed oil deodorizer distillates (RDOD) followed by
gas chromatography-mass spectrometry (GS-MS) analysis. Several
parameters affecting the extraction efficiency, including the amount of
adsorbent, extraction time and temperature, desorption solvent, and
desorption time, were investigated. The procedure exhibited desirable
extraction efficiency within 30 min at 35 ºC. Recoveries higher than
80% were obtained with acetone as eluent and the method was
successfully applied to concentrate the β-sitosterol in RDOD
CO2-supercritical extract. Compared to C18-silica and graphitic carbon,
the composite showed satisfactory results for the extraction of
β-sitosterol from oil samples.