Determination of ionol in oils in the presence of low-molecular-weight phenols using reversed-phase HPLC |
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| Authors: | E. A. Podolina O. B. Rudakov E. A. Khorokhordina A. M. Grigor’ev |
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| Affiliation: | (1) Electrostal’ Polytechnical Institute, Branch of the Moscow State Institute of Steel and Alloys, ul. Pervomaiskaya 7, Electrostal’, 144000, Russia;(2) Voronezh State Architecture and Building University, ul. 20 let Oktyabrya 84, Voronezh, 394004, Russia;(3) Scientific Research Institute of Technologies for Medical Industry, ul. Michurina 39a, Belgorod, 308002, Russia |
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| Abstract: | A procedure was developed for extracting phenol-type antioxidants from oils. The extraction system consisted of isopropanol, 25% NH3, water, and ammonium sulfate as a salting-out agent. The optimum conditions were found for determining ionol in the presence of phenol and alkylphenols in the isopropanol extract using reversed-phase HPLC with an UV-detector. The time of analysis was 55 min. The detection limits in oils (taking into account extraction preconcentration) were 0.0005 mg/L for phenol, 0.0006 mg/L for cresols, and 0.015 mg/L for ionol. |
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