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Determination of tert‐Butylhydroxytoluene by Flow Injection Analysis at Polymer Modified Glassy Carbon Electrodes
Author(s) -
Garcı´a C. D.,
Ortiz P. I.
Publication year - 1998
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/(sici)1521-4109(199809)10:12<832::aid-elan832>3.0.co;2-w
Subject(s) - amperometry , electrode , flow injection analysis , polymer , phosphate buffered saline , materials science , electrochemistry , volumetric flow rate , glassy carbon , analytical chemistry (journal) , chromatography , chemistry , detection limit , cyclic voltammetry , composite material , quantum mechanics , physics
A flow injection method for the determination of the antioxidant BHT using polymer modified electrodes in connection with amperometric detection is proposed. The procedure is based on the electrochemical oxidation at 0.700 V (vs. Ag/AgCl[3M NaCl]) in phosphate buffer solution (pH 7.2). BHT is determined over the range 0.001–0.020 or 0.005–0.030 gL −1 . Other analytical parameters, such as electrode working potential, flow rate, electrodeposited charge and solution pH were optimized. The proposed method was applied to the determination of BHT in electrical transformer and vegetable oils samples. The results were compared with the HPLC‐UV detection standard technique.