Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, TU Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal.
J Hazard Mater. 2011 Feb 28;186(2-3):1154-62. doi: 10.1016/j.jhazmat.2010.11.119. Epub 2010 Dec 3.
1-Phenyl-2-(2-hydroxyphenylhydrazo)butane-1,3-dione (H(2)L) was used as an effective ionophore for copper-selective poly(vinyl) chloride (PVC) membrane electrodes. Optimization of the composition of the membrane and of the conditions of the analysis was performed, and under the optimized conditions the electrode has a detection limit of 6.30×10(-7) M Cu(II) at pH 4.0 with response time 10s and displays a linear EMF versus log[Cu(2+)] response over the concentration range 2.0×10(-6) to 5.0×10(-3) M Cu(II) with a Nernstian slope of 28.80±0.11 mV/decade over the pH range of 3.0-8.0. The sensor is stable for 9 weeks and exhibits good selectivity with respect to alkali, alkali earth and transition metal ions (e.g. Na(+), K(+), Ba(2+), Ca(2+), Zn(2+), Cd(2+), Co(2+), Mn(2+), Ni(2+), Fe(2+), Al(3+)) in the 3.0-8.0 pH range. It was successfully applied for the direct determination of copper(II) in zinc, aluminum and nickel based alloys, in soils polluted by oil, and as an indicator electrode for potentiometric titration of copper ions with EDTA.
1-苯基-2-(2-羟基苯腙基)丁烷-1,3-二酮（H(2)L）被用作铜选择性聚氯乙烯（PVC）膜电极的有效离子载体。对膜的组成和分析条件进行了优化，在优化条件下，该电极在 pH 4.0 下对 Cu(II)的检测限为 6.30×10(-7) M，响应时间为 10s，并在 2.0×10(-6)至 5.0×10(-3) M Cu(II)的浓度范围内显示出与对数[Cu(2+)]呈线性 EMF 响应，Nernst 斜率为 28.80±0.11 mV/decade，pH 范围为 3.0-8.0。传感器稳定 9 周，在 3.0-8.0 pH 范围内对碱、碱土和过渡金属离子（例如 Na(+), K(+), Ba(2+), Ca(2+), Zn(2+), Cd(2+), Co(2+), Mn(2+), Ni(2+), Fe(2+), Al(3+))具有良好的选择性。它成功地应用于锌、铝和镍基合金中铜(II)的直接测定、油污染土壤中的测定，以及 EDTA 与铜离子的电位滴定中的指示电极。
