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Vertically Aligned Carbon Nanotube Based Electrochemcial Sensor for Salbutamol Detection

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This paper reports electrochemical sensing of salbutamol, a prohibited drug in sports, with a new working electrode based on vertically aligned carbon nanotubes (V-CNT). V-CNTs were synthesized by chemical vapor deposition using acetylene and argon gases at 700 °C on gold coated silicon substrates. A simple electrochemical cell including V-CNTs, silver wire (Ag) and platinum (Pt) wire was designed. Electrochemical characterization by cyclic voltammetry (CV) was carried out with different salbutamol concentrations ranging from 10−7 to 10−4 mol·l−1. CV curves exhibited irreversible oxidation peak at ∼0.7 V. The current response was linear with sensitivity of 0.13 A/mol·l−1 and a minimum detection of 3 × 10−7 mol·l−1. In addition, its pharmaceutical applications were demonstrated. The direct analysis of salbutamol in pharmaceutical products yielded a good analytical feature with wide dynamic working range (0.5 to 100 M) and matrices' interference was found to be negligible. Thus, V-CNTs electrode is a potential candidate for the electrochemical detection of salbutamol.
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Document Type: Research Article

Publication date: August 1, 2010

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