Tyszczuk-Rotko Katarzyna, Domańska Katarzyna, Czech Bożena, Rotko Marek
Faculty of Chemistry, Department of Analytical Chemistry and Instrumental Analysis, Maria Curie-Skłodowska University, 20-031 Lublin, Poland.
Faculty of Chemistry, Department of Analytical Chemistry and Instrumental Analysis, Maria Curie-Skłodowska University, 20-031 Lublin, Poland.
Talanta. 2017 Apr 1;165:474-481. doi: 10.1016/j.talanta.2016.12.066. Epub 2016 Dec 24.
A simple and sensitive adsorptive stripping voltammetric procedure for the determination of trace concentration of U(VI) in natural water samples was developed. In order to remove surface active compounds from water sample solutions, a TiO/AlO photocatalysis system was applied. The linear calibration graph of U(VI) in the simultaneous presence of 2mgL anionic, cationic and nonionic surfactants, in the range from 5×10 to 2×10molL (180s) was achieved. The detection limit obtained in the solution after the use of UV-irradiation (10min) with TiO/AlO photocatalyst (0.9g) is equal to 2.3×10mol L. The presented procedure was successfully applied to uranium determination in SLEW-3 certified reference material, and to river water samples. In addition, a very low detection limit (2.9×10molL) for accumulation time of 180s was achieved due to application of a reversible deposited mediator (Zn) in the step of lead film electrode preparation.
开发了一种简单灵敏的吸附溶出伏安法程序，用于测定天然水样中痕量浓度的U(VI)。为了从水样溶液中去除表面活性化合物，应用了TiO/AlO光催化系统。在同时存在2mgL阴离子、阳离子和非离子表面活性剂的情况下，U(VI)的线性校准曲线在5×10至2×10molL范围内（180秒）获得。在使用TiO/AlO光催化剂（0.9g）进行紫外线照射（10分钟）后的溶液中获得的检测限等于2.3×10mol L。所提出的程序成功应用于SLEW-3标准参考物质中的铀测定以及河水样品的测定。此外，由于在铅膜电极制备步骤中应用了可逆沉积介质（Zn），在180秒的积累时间下实现了非常低的检测限（2.9×10molL）。
