Departament de Química Analítica, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain.
Departament de Química Analítica, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain.
Anal Chim Acta. 2016 Apr 15;916:17-23. doi: 10.1016/j.aca.2016.03.003. Epub 2016 Mar 5.
Three different commercial carbon nanomaterial-modified screen-printed electrodes based on graphene, carbon nanotubes and carbon nanofibers were pioneeringly tested as electrode platforms for the plating with Sb film. They were microscopically and analytically compared to each other and to the most conventional unmodified carbon screen-printed electrode (SPCE). The obtained detection and quantification limits suggest that the in-situ antimony film electrode prepared from carbon nanofibers modified screen-printed electrode (SbSPCE-CNF) produces a better analytical performance as compared to the classical SPCE modified with antimony for Pb(II) and Cd(II) determination, approving its appropriateness for measuring low μg L(-1) levels of the considered metals. In-situ SbSPCE-CNF was successfully used for the simultaneous determination of Pb(II) and Cd(II) ions, by means of differential pulse anodic stripping voltammetry, in a certified reference estuarine water sample with a very high reproducibility and good trueness.
三种不同的商业碳纳米材料修饰的丝网印刷电极，基于石墨烯、碳纳米管和碳纳米纤维，被开创性地测试为镀 Sb 膜的电极平台。它们在微观和分析上相互比较，也与最传统的未修饰碳丝网印刷电极（SPCE）进行了比较。所得到的检测和定量极限表明，与经典的用于 Pb(II) 和 Cd(II) 测定的 Sb 修饰的 SPCE 相比，由碳纳米纤维修饰的丝网印刷电极（SbSPCE-CNF）原位制备的锑膜电极产生了更好的分析性能，证明其适用于测量考虑的金属的低μg L(-1)水平。通过差分脉冲阳极溶出伏安法，原位 SbSPCE-CNF 成功地用于同时测定认证参考河口水样中的 Pb(II) 和 Cd(II) 离子，具有非常高的重现性和良好的准确性。
