S. L. Didukh-Shadrina, D. I. Belyakovich, V. N. Losev, S. I. Metelitsa
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引用次数: 0
Abstract
A polymer sorbent obtained by cocondensation of polyvinyl alcohol, formaldehyde, and thiourea (PVF-TU) is proposed for the concentration of Se(IV) and Se(VI) from aqueous solutions. The sorbent quantitatively extracts Se(IV) from 1–2 M HCl and Se(VI) at pH 3–6 in static mode (degree of recovery >98%). The time to achieve sorption equilibrium does not exceed 10 min. The sorption capacity of PVF-TU determined from horizontal sections of sorption isotherms is 50 μmol/g for Se(IV) and 25 μmol/g for Se(VI). The sorbent, containing Se(IV) and Se(VI) on the surface, dissolves in 5 mL of 2–4 M HNO3 at 90°C. With 100 mL of sample and 5 mL of desorbent solution, the concentration factor is 20. The developed procedure was used to determine the Se(IV) and Se(VI) content in bottled mineral waters using inductively coupled plasma atomic emission spectrometry and mass spectrometry.
提出了一种由聚乙烯醇、甲醛和硫脲（PVF-TU）缩合而成的聚合物吸附剂，用于吸附水溶液中的硒（IV）和硒（VI）。在静态模式下，从1-2 M HCl和pH 3-6的Se（VI）中定量提取Se(IV)（回收率98%）。达到吸附平衡的时间不超过10分钟。通过等温线水平剖面测定PVF-TU对Se（IV）和Se（VI）的吸附量分别为50 μmol/g和25 μmol/g。表面含有Se（IV）和Se（VI）的吸附剂在90℃下溶于5ml 2-4 M HNO3中。样品100ml，脱附液5ml，浓度系数为20。采用电感耦合等离子体原子发射光谱法和质谱法测定瓶装矿泉水中硒（IV）和硒（VI）的含量。
期刊介绍：
The Journal of Analytical Chemistry is an international peer reviewed journal that covers theoretical and applied aspects of analytical chemistry; it informs the reader about new achievements in analytical methods, instruments and reagents. Ample space is devoted to problems arising in the analysis of vital media such as water and air. Consideration is given to the detection and determination of metal ions, anions, and various organic substances. The journal welcomes manuscripts from all countries in the English or Russian language.
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