An ordered mesoporous carbon modified electrochemical sensor for solid-phase microextraction and determination of triclosan in environmental samples

SENSORS AND ACTUATORS B-CHEMICAL

卷:232

Article

Regiart, Matias¹  Magallanes, Jorge L.¹  Barrera, Deicy²  Villarroel-Rocha, Jhonny²  Sapag, Karim²  Raba, Julio¹  Bertolino, Franco A.¹ 

[1] Univ Nacl San Luis, CONICET, INQUISAL, Dept Quim, Chacabuco 917, San Luis, Argentina

[2] Univ Nacl San Luis, CONICET, INFAP, Lab Solidos Porosos, Chacabuco 917, San Luis, Argentina

关键词: Electrochemical sensor;    Solid-phase microextraction;    Ordered mesoporous carbon;    Triclosan;    Environmental monitoring;   

DOI  :  10.1016/j.snb.2016.04.031

来源: Elsevier

【 摘 要 】

A simple and sensitive electrochemical sensor was performed with an ordered mesoporous carbon modified screen-printed carbon electrode (SPCE) to detect triclosan (TCS) in river water samples. A nanostructured mesoporous carbon CMK-3 type was successfully obtained from ordered mesoporous silica SBA-15 type used as hard-templated and sucrose as carbon precursor. Due to its high specific surface area (1125 m(2) g(-1)), large pore volume (1.16 cm(3) g(-1)), uniform mesostructure (4.4 nm), good conductivity and excellent electrochemical activity, this porous carbon material provides selectivity and sensitivity for the electrochemical determination. CMK-3 was immobilized onto a SPCE using chitosan (CH) as a binder. CMK-3/CH/SPCE was characterized by cyclic voltammetry, transmission electron microscopy, scanning electron microscopy, X-ray diffraction, energy dispersive spectrometry and N-2 adsorption-desorption isotherms. CMK-3/CH was used for solid-phase microextraction, since it has an excellent extraction selectivity towards organic aromatic compounds. The electrochemical behavior of TCS showed an irreversible oxidation peak measured by square wave voltammetry. The detection limit of this electrochemical sensor was 0.24 ng mL(-1) with a wide linear range from 0.8 ng mL(-1) to 40 ng mL(-1), the intra- and inter-assay coefficients of variation were below 4%. This electrochemical platform offered a useful tool for on-site TCS determination in environmental samples. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free