An economic and extremely selective device for Pd(II) determination in very acidic solutions, TazoC-Mar@, is presented. The sensor was prepared via an ion exchange technique of an azoic ligand, (2-(tetrazolylazo)-1,8 dihydroxy naphthalene-3,6,-disulphonic acid), named TazoC, on a Macroporous Strong Anion Exchange Resin, namely Marathon® (Dow Chemical-USA). The TazoC-Mar@ rapidly forms complexes with palladium(II) ions, which give an intense blue colour to the solid phase, even at low pH. The reaction is highly selective and no other metal ions react with the device at this pH. Moreover, the quantification of Pd(II) is reliable when applying partial least squares regression (PLS) to relate the signal to the metal ion concentration. The regression model gives a good fit and correct predictions of Pd(II) concentrations in unknown samples. The method presented here is highly sensitive with an LOD and LOQ equal to 0.2 nM and 0.5 nM, respectively.

中文翻译：

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极端酸性溶液中 Pd（ii）感测中不寻常的PLS应用†

提出了一种在极酸性溶液中测定Pd（II）的经济且极具选择性的装置TazoC-Mar @。该传感器是通过在大孔强阴离子交换树脂（即Marathon®）上通过偶氮配体（2-（四唑基）-1,8二羟基萘-3,6，-二磺酸）（称为TazoC）的离子交换技术制备的。（美国道化学公司）。TazoC-Mar @与钯（II）离子迅速形成络合物，即使在低pH值下，也会使固相产生强烈的蓝色。该反应具有很高的选择性，在此pH值下，没有其他金属离子与该设备发生反应。此外，Pd（II当应用偏最小二乘回归（PLS）将信号与金属离子浓度相关时，）是可靠的。回归模型可以很好地拟合和正确预测未知样品中Pd（II）的浓度。此处介绍的方法高度敏感，其LOD和LOQ分别等于0.2 nM和0.5 nM。