TY - JOUR
TI - Simultaneous determination of tert-butylhydroquinone, propyl gallate, and butylated hydroxyanisole by flow-injection analysis with multiple-pulse amperometric detection
AU - Bavol, D.
AU - Economou, A.
AU - Zima, J.
AU - Barek, J.
AU - Dejmkova, H.
JO - TALANTA
PY - 2018
VL - 178
TODO - null
SP - 231-236
PB - Elsevier B.V.
SN - 0039-9140
TODO - 10.1016/j.talanta.2017.09.032
TODO - Antioxidants;  Glass;  Glass membrane electrodes, Amperometric methods;  Britton-Robinson buffer;  Extraction procedure;  Flow injection analysis;  Glassy carbon electrodes;  Multiple pulse;  Simultaneous determinations;  Tert-butylhydroquinone (tBHQ), Butylated hydroxyanisole, 2-tert-butylhydroquinone;  butylated hydroxyanisole;  gallic acid propyl ester;  hydroquinone derivative, analysis;  chewing gum;  devices;  electrochemistry;  electrode;  flow injection analysis;  procedures;  time factor, Butylated Hydroxyanisole;  Chewing Gum;  Electrochemistry;  Electrodes;  Flow Injection Analysis;  Hydroquinones;  Propyl Gallate;  Time Factors
TODO - We report the first amperometric method for the simultaneous determination of tert-butylhydroquinone (tBHQ), propyl gallate (PG), and butylated hydroxyanisole (BHA) using flow injection analysis coupled to multiple-pulse amperometry. A sequence of potential pulses was selected in order to detect tBHQ, PG, and BHA separately in a single injection step at a glassy carbon electrode without the need of a preliminary separation. A mixture of methanol and 0.040 M Britton-Robinson buffer was used both as a carrier solution and for dilution of analyzed solutions before injection. The method is precise (RSD < 5%, n = 10), fast (a frequency of 140 injections h−1), provides sufficiently low quantification limits (2.51, 1.45, and 0.85 μmol L–1 for tBHQ, PG, and BHA, respectively) and can be easily applied without high demands on instrumentation. As a practical application, the determination of these antioxidants contained in commercial chewing gum samples was carried out by applying a simple extraction procedure. © 2017 Elsevier B.V.
ER -