Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.1039/d2ay00903j

Ключевые слова: selenium, 7782-49-2, silicon dioxide, 10279-57-9, 14464-46-1, 14808-60-7, 15468-32-3, 60676-86-0, 7631-86-9, water, 7732-18-5, selenium, silicon dioxide, water

Аннотация: Functionalized adsorbents with poly-(4,9-dioxododecane-1,12-guanidine) (SiO2-PDDG) and mercaptophenyl groups (MPhS) were used for the separation of Se(VI) and Se(IV) for the first time. Fixation of PDDG was characterized by capillary electrophoresis and TGA/DSC. The quantitative extraction of Se(VI) proceeded due to anion exchange at pH 3-7. The adsorption capacity of SiO2-PDDG for Se(VI) was 28 μmol g-1. Silicas with mercaptophenyl groups were used for the extraction of Se(IV) from solutions in the range of 2 M HCl - pH 6.5. The adsorption capacity of MPhS was 35 μmol g-1. A system of columns containing synthesized adsorbents was proposed for the separation of Se(VI) and Se(IV) and their subsequent determination by ICP-MS. Optimal parameters of adsorption include a flow rate of 1 mL min-1, pH of 5, and sample volume of 200 mL. Se(IV) was desorbed with 5 mL of 0.25 M 2,3-dimercapto-1-propanesulphonic acid and Se(VI) with 5 mL of 1 M HNO3. The preconcentration factor was 40. The limits of detection (3s) were 0.75 and 1.25 ng L-1 for Se(VI) and Se(IV), respectively. The proposed method (SPE-ICPMS) was used to determine selenium species in natural water and certified reference materials. The separation was carried out directly at the sampling site.

Журнал: Analytical methods : advancing methods and applications

Выпуск журнала: Vol. 14, Is. 28

Номера страниц: 2771-2781

ISSN журнала: 17599679

Издатель: NLM (Medline)

• Losev V. (Scientific Research Engineering Centre "Kristall", Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)
• Didukh-Shadrina S. (Scientific Research Engineering Centre "Kristall", Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)
• Orobyeva A. (Scientific Research Engineering Centre "Kristall", Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)
• Borodina E. (Scientific Research Engineering Centre "Kristall", Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)
• Elsuf'ev E. (Institute of Chemistry and Chemical Technology, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, 660036, Russian Federation)
• Metelitsa S. (Scientific Research Engineering Centre "Kristall", Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)
• Ondar U. (Tuva State University, Tuva Republic, Kyzyl, 667000, Russian Federation)

• Scopus