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Ya Y.,China Ministry of Agriculture Nanning | Ya Y.,Guangxi Sugarcane Research Institute | Mo L.,China Ministry of Agriculture Nanning | Mo L.,Guangxi Sugarcane Research Institute | And 14 more authors.
Colloids and Surfaces B: Biointerfaces | Year: 2012

Mesoporous silica (MS) and amino-functionalized mesoporous silica (NH 2-FMS) were prepared and characterized using the techniques of transmission electron microscopy (TEM) and nitrogen adsorption-desorption. Voltammetry was used to investigate the electrochemical behavior of capsaicin at the amino-functionalized mesoporous silica, which was modified through carbon paste electrode (NH 2-FMS/CPE). NH 2-FMS/CPE showed better performance for the electrochemical oxidation of capsaicin, when compared with bare carbon paste electrode (CPE) and mesoporous silica modified carbon paste electrode (MS/CPE). We optimized the experimental conditions influencing the determination of capsaicin. Under optimal conditions, the oxidation peak current was proportional to capsaicin concentration in the range of 0.040-0.40μmolL -1and 0.40-4.0μmolL -1, when the detection limit was 0.020μmolL -1 (S/N=3). The above method was successfully applied to determine capsaicin in hot pepper samples, yielding satisfactory results. The spiked recoveries were in the range of 93.1-100.7%. © 2012 Elsevier B.V..

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