Voltammetric determination of the phenolic antioxidants 3-TERT-BUTYL-4-HYDROXYANISOLE (cas 121-00-6) and tert-butylhydroquinone at a polypyrrole electrode modified with a nickel phthalocyanine complex
-
Add time:09/04/2019 Source:sciencedirect.com
The voltammetric behaviour of the antioxidants 3-TERT-BUTYL-4-HYDROXYANISOLE (cas 121-00-6) (BHA) and tert-butylhydroquinone (TBHQ), at a polymer electrode modified with nickel phthalocyanine as electron mediator, is described, and an electroanalytical method for the determination of these antioxidants based on their electrochemical oxidation on the modified electrode is proposed. Cyclic voltammograms showed well-defined oxidation peaks slightly shifted towards less positive potentials with respect to those obtained at the platinum disk electrode for both antioxidants. The peak currents measured at the modified electrode are considerably higher than those obtained at the unmodified electrode. A scan rate of 100 mV s−1, a minimum methanol percentage of 0.5% and a 0.1-M Britton-Robinson medium were chosen as working conditions. The obtained results suggest that the BHA oxidation produces the TBHQ reduction product. This product is oxidised during the second cyclic scan, to generate the mentioned TBHQ as final product. These studies also reveal that sensitive response for both antioxidants can be obtained by using the differential pulse voltammetry (DPV) technique. Responses observed are dependent on the nature of the control solution (% methanol and pH) and the nature of voltammetric conditions (potential amplitude, ΔE, and scan rate, vb). These factors have been modified in order to find the best analytical conditions. The mutual interferences between both antioxidants and the measurement reproducibility were tested. Using cyclic voltammetry (CV) and differential pulse voltammetry, BHA and TBHQ linear calibration graphs were obtained. The detection limits were 2.1 ppm for both when CV was used, and 18.7 ppm (BHA) and 1.23 ppm (TBHQ) for DPV. The developed methods were applied to the determination of BHA in spiked glaze biscuits and TBHQ in spiked mushroom cream.
We also recommend Trading Suppliers and Manufacturers of 3-TERT-BUTYL-4-HYDROXYANISOLE (cas 121-00-6). Pls Click Website Link as below: cas 121-00-6 suppliers
Prev:Metabolism of 2- and 3-TERT-BUTYL-4-HYDROXYANISOLE (cas 121-00-6) (2- and 3-BHA) in the rat (II): Metabolism in forestomach and covalent binding to tissue macromolecules
Next:Mutagenicity of 3-TERT-BUTYL-4-HYDROXYANISOLE (cas 121-00-6) (BHA) and its metabolites in short-term tests in vitro) - 【Back】【Close 】【Print】【Add to favorite 】
- Related Information
- Promoting activity of 3-TERT-BUTYL-4-HYDROXYANISOLE (cas 121-00-6) (BHA) in BALB/3T3 cell transformation09/06/2019
- Mutagenicity of 3-TERT-BUTYL-4-HYDROXYANISOLE (cas 121-00-6) (BHA) and its metabolites in short-term tests in vitro09/05/2019
- Metabolism of 2- and 3-TERT-BUTYL-4-HYDROXYANISOLE (cas 121-00-6) (2- and 3-BHA) in the rat (II): Metabolism in forestomach and covalent binding to tissue macromolecules09/03/2019
- Short paperKinetics of 3-TERT-BUTYL-4-HYDROXYANISOLE (cas 121-00-6) (BHA) in man09/02/2019
- Protective effects of 2(3)-tert-butyl-4-hydroxyanisole on chemical carcinogenesis09/01/2019
- Trypanosoma cruzi: trypanocidal effect of 2(3)-tert-butyl-4-hydroxyanisole (BHA) on several strains of epimastigote and trypomastigote forms08/31/2019
- Metabolism of 2- and 3-TERT-BUTYL-4-HYDROXYANISOLE (cas 121-00-6) in the rat (III): Metabolites in the urine and feces08/30/2019
- Conformational stability, vibrational and NMR analysis, chemical potential and thermodynamical parameter of 3-TERT-BUTYL-4-HYDROXYANISOLE (cas 121-00-6)08/29/2019
- Analytical MethodsSimultaneous analysis of tert-butylhydroquinone, tert-butylquinone, butylated hydroxytoluene, 2-tert-butyl-4-hydroxyanisole, 3-TERT-BUTYL-4-HYDROXYANISOLE (cas 121-00-6), α-tocopherol, γ-tocopherol, and δ-tocopherol in edible oils by normal-phase high performance liquid chromatography08/28/2019