Τίτλος:
Simultaneous determination of tert-butylhydroquinone, propyl gallate, and butylated hydroxyanisole by flow-injection analysis with multiple-pulse amperometric detection
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
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.
Συγγραφείς:
Bavol, D.
Economou, A.
Zima, J.
Barek, J.
Dejmkova, H.
Λέξεις-κλειδιά:
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
DOI:
10.1016/j.talanta.2017.09.032
