Abstract In this work, a polyurethane foam (PUF) functionalized with phenylfluorone (PUF-PF) was packed in a minicolumn and used as an on-line preconcentration system for cadmium and copper determination in water samples. The experimental conditions (both chemical and physical) were optimized to achieve the highest sensitivity. A study of possible ion interference on the retention of cadmium and copper was also performed. The enrichment factors obtained were 14 and 16 for copper and cadmium, respectively, using a preconcentration time of 1 min. The proposed system allowed the determination of metals with limits of detection (3σ) of 0.8 and 0.3 μg L− 1 for Cu(II) and Cd(II), respectively. The precision of the procedures was also calculated as 7.6% for Cu(II) (at 25 μg L− 1) and 4.0% for Cd(II) (at 10 μg L− 1). The limits of quantification obtained were 2.6 and 0.8 μg L− 1 for Cu(II) and Cd(II), respectively. Cadmium and copper contents in water samples (from rivers and swimming pools) were determined by applying the proposed procedure. In these samples, recovery tests were conducted in order to evaluate the accuracy of the method; the recovery percentages varied between 83 and 109%.

中文翻译：

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苯氟酮官能化聚氨酯泡沫用于水样中铜和镉的在线预富集和火焰原子吸收光谱法测定

摘要 在这项工作中，一种用苯基氟酮 (PUF-PF) 功能化的聚氨酯泡沫 (PUF) 装入微型柱中，用作在线预浓缩系统，用于测定水样中的镉和铜。优化实验条件（化学和物理）以实现最高灵敏度。还进行了可能的离子干扰对镉和铜保留的研究。使用 1 分钟的预浓缩时间，获得的铜和镉的富集因子分别为 14 和 16。所提议的系统允许以检测限 (3σ) 分别为 Cu(II) 和 Cd(II) 的 0.8 和 0.3 μg L- 1 测定金属。程序的精确度也计算为 Cu(II)（25 μg L-1）为 7.6%，Cd(II)（10 μg L-1）为 4.0%。Cu(II) 和 Cd(II) 的定量限分别为 2.6 和 0.8 μg L-1。应用建议的程序测定水样（来自河流和游泳池）中的镉和铜含量。在这些样品中，进行了回收率测试以评估方法的准确性；回收率在 83% 到 109% 之间变化。