Solid phase extraction of beta-sitosterol and alpha-tocopherol from sunflower oil deodorizer distillate using desilicated zeolite

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Karaoglu O., Alpdogan G., Ozdemir I. S., Ertas E.

GRASAS Y ACEITES, vol.71, no.3, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 71 Issue: 3
  • Publication Date: 2020
  • Doi Number: 10.3989/gya.0570191
  • Journal Name: GRASAS Y ACEITES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Fuente Academica Plus, BIOSIS, CAB Abstracts, Compendex, Food Science & Technology Abstracts, Veterinary Science Database, Directory of Open Access Journals, DIALNET
  • Yıldız Technical University Affiliated: Yes


In this study, the efficiency of using zeolite-based adsorbents in a solid phase extraction (SPE) procedure of alpha-tocopherol and beta-sitosterol isolation from Sunflower Oil Deodorizer Distillate (SuDOD) without pre-treatment was investigated. The results showed that 99.2% a-tocopherol and 97.3% beta-sitosterol were successfully isolated as pure fractions from SuDOD, when desilicated ZSM-5-type zeolite (DSiZSM-5) was used as adsorbent on a SPE. A simple and rapid HPLC method for simultaneous alpha-tocopherol and beta-sitosterol analysis was developed and validated according to AOAC guidelines. It was found that the inclusion of a DSiZSM-5 SPE step increased the precision of the alpha-tocopherol and beta-sitosterol analysis. In conclusion, DSiZSM-5 zeolite was proven to be an efficient adsorbent which can be used not only for the recovery of alpha-tocopherol and beta-sitosterol from SuDOD in industrial scale, but also in a laboratory scale clean-up method prior to the analysis of alpha-tocopherol and beta-sitosterol.