Highly sensitive determination of capsaicin using a carbon paste electrode modified with amino-functionalized mesoporous silica

文献类型： 外文期刊

第一作者： Mo, Leixing

作者： Mo, Leixing;Wang, Tianshun;Fan, Yegeng;Liao, Jie;Chen, Zhongliang;Fang, Fengxue;Liang, Jun;Ya, Yu;Mo, Leixing;Wang, Tianshun;Fan, Yegeng;Liao, Jie;Chen, Zhongliang;Fang, Fengxue;Manoj, Kumar Srivastava;Liang, Jun;Li, Chunya

作者机构：

关键词： Amino-functionalized mesoporous silica;Capsaicin;Modified electrode;Voltammetry

期刊名称：COLLOIDS AND SURFACES B-BIOINTERFACES （ 影响因子：5.268； 五年影响因子：4.957 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： 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 ~(-1)and 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%.

分类号： O648

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