Determination of Sterically Hindered Phenols and α-Tocopherol by Cyclic Voltammetry
作者： Guzel Ziyatdinova , Aliya Khuzina , Herman Budnikov
DOI: 10.1080/00032719.2012.677788
关键词:
摘要: Sterically hindered phenols (2,6-di-tert-butyl-4-methylphenol (BHT) and its derivatives) are irreversibly oxidized at +0.96–1.30 V on glassy carbon electrode (GCE) in 0.1 M LiCIO4 acetonitrile accordance to cyclic voltammetry data. α-Tocopherol gives oxidation step +0.4 V voltammograms under the same conditions. Oxidation process leads formation of corresponding quinoid derivatives. Calibration graphs linearity is 1.5–2 order for all compounds investigation. Limits detection range 9.6–44.3 µM. The approach has been applied determination BHT α-tocopherol vegetable lubricating oils as well pharmaceuticals cosmetics using preliminary single extraction analytes with 15 min oil/extractant ratio 1:2.5.
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