Determination of phenol by differential pulse voltammetry with a sepiolite-modified carbon paste electrode |
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Authors: | L. Herná ndez, P. Herná ndez Z. Sosa |
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Affiliation: | (1) Departamento de Química Analítica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain;(2) Departamento de Química Analítica, Universidad de La Laguna, E-38204, Spain |
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Abstract: | Summary The determinations of phenol is studied by means of a carbon paste electrode modified with 10% sepiolite using DPV. A 10 min preconcentration step was performed at pH 1.5 under open circuit conditions. Measurements were made in another cell by DPV with E=100 mV (sweep rate = 40 mV/s) in 0.02 mol/l KNO3 medium at pH 2. Detection limits (3 ) of 30 ng/ml were achieved for determinations in orange, lemon and cola drinks.
Phenolbestimmung durch Differentialpuls-Voltammetrie mit einer Sepiolit-modifizierten Kohlepaste-Elektrode |
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