Laboratório de Química Analítica (LQA), Universidade Estadual do Sudoeste da Bahia, Campus de Jequié, 45206-190, Jequié, Bahia, Brazil.
Environ Monit Assess. 2010 Dec;171(1-4):163-9. doi: 10.1007/s10661-009-1268-z. Epub 2009 Dec 16.
Amberlite XAD-4 resin functionalized with β-nitroso-α-naphthol was applied to an online system for the preconcentration and determination of uranium. U (VI) ions were retained on the minicolumn at an appropriate pH and then desorbed with acid solution. The amount of uranium in the eluate was measured spectrophotometrically at 650 nm using Arsenazo III as a colorimetric reagent. The limit of detection and the preconcentration factor were 1.8 μg L(-1) and 10, respectively. The chemical and flow variables affecting the preconcentration were studied. The influence of several ions on the system was also investigated. The method was successfully applied for the evaluation of uranium in water and in effluent samples.
采用β-亚硝基-α-萘酚功能化的 Amberlite XAD-4 树脂，应用于铀的在线预浓缩和测定的系统。在适当的 pH 值下，U(VI)离子被保留在微型柱上，然后用酸溶液解吸。用偶氮胂 III 作为显色试剂，在 650nm 处测定洗脱液中铀的含量。检测限和预浓缩因子分别为 1.8μg/L 和 10。研究了影响预浓缩的化学和流动变量，还考察了几种离子对该体系的影响。该方法成功地应用于水样和废水样中铀的评价。
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