Sosa Velia, Serrano Núria, Ariño Cristina, Díaz-Cruz José Manuel, Esteban Miquel
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.
Talanta. 2014 Feb;119:348-52. doi: 10.1016/j.talanta.2013.11.032. Epub 2013 Nov 14.
A commercially available sputtered bismuth screen-printed electrode (BispSPE) has been pioneeringly applied for the simultaneous determination of Cd(II) and Pb(II) ions in a certified groundwater sample by means of differential pulse anodic stripping voltammetry (DPASV) as an alternative to more conventional bismuth screen-printed carbon electrodes (BiSPCEs). BispSPEs can be used for a large set of measurements without any previous plating or activation. The obtained detection and quantification limits suggest that BispSPEs produce a better analytical performance as compared to In-situ BiSPCE for Pb(II) and Cd(II) determination, but also to Ex-situ BiSPCE for Cd(II) determination. The results confirm the applicability of these devices for the determination of low level concentrations of these metal ions in natural samples with very high reproducibility (0.7% and 2.5% for Pb(II) and Cd(II) respectively), and good trueness (0.3% and 2.4% for Pb(II) and Cd(II) respectively).
一种市售的溅射铋丝网印刷电极（BispSPE）已被开创性地应用于通过差分脉冲阳极溶出伏安法（DPASV）同时测定认证地下水中的镉（II）和铅（II）离子，作为更传统的铋丝网印刷碳电极（BiSPCE）的替代方法。BispSPE可用于大量测量，无需任何预先电镀或活化。获得的检测限和定量限表明，与原位BiSPCE相比，BispSPE在测定Pb（II）和Cd（II）时具有更好的分析性能，与异位BiSPCE相比，在测定Cd（II）时也具有更好的分析性能。结果证实了这些装置适用于测定天然样品中低浓度的这些金属离子，具有非常高的重现性（Pb（II）和Cd（II）分别为0.7%和2.5%）和良好的准确性（Pb（II）和Cd（II）分别为0.3%和2.4%）。
