Using Silica Modified by Tiron for Metal Preconcentration and Determination in Natural Waters by Inductively Coupled Plasma Atomic Emission Spectrometry

• Published in: Journal of Analytical Chemistry
• Main Authors: Didukh (Дидух Светлана Леонидовна), S. L., Losev (Лосев Владимир Николаевич), V. N., Mukhina (Мухина Александра Николаевна), A. N., Trofimchuk (Трофимчук Анатолий Константинович), A. K.
• Other Authors: Институт цветных металлов и материаловедения, Кафедра композиционных материалов и физико-химии металлургических процессов, Кафедра физической и неорганической химии
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: 2016
• Subjects: modified silica; polyhexamethylene guanidine; Tiron; metal ions; adsorption preconcentration; determination by atomic emission spectrometry; 31.19.15; Krasnoyarsk Krai
• Online Access: https://doi.org/10.1134/S1061934816090082; https://openrepository.ru/article?id=454010

Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала. A new adsorbent is synthesized on the basis of silica consecutively modified by polyhexamethylene guanidine and 4,5-dihydroxy-1,3-benzenedisulfonic acid (Tiron) for the group preconcentration of Fe(III), Al(III), Cu(II), Pb(II), Zn(II), and Mn(II) followed by determination by inductively coupled plasma atomic emission spectrometry. The adsorbent in the batch mode quantitatively (recovery 98−99%) extracts Fe(III), Al(III) and Cu(II) ions at pH 4.0 and Fe(III), Al(III), Cu(II), Pb(II), Zn(II), and Mn(II) ions at pH 7.0; the time of attainment of an adsorption equilibrium does not exceed 10 min. Consecutive preconcentration at pH 4.0 and 7.0 in the batch and dynamic modes ensures the quantitative separation of Fe(III), Al(III), and Cu(II) from Pb(II), Zn(II), and Mn(II) and their separate determination. The quantitative desorption of metals was attained with 0.5−1.0 M HNO3 (5 or 10 mL). In preconcentration from 200 mL of solution with 5 mL of a desorbing solution, the preconcentration coefficient was equal to 40. The developed procedure was used for the determination of metal ions in river waters of Krasnoyarsk Krai. The results obtained were verified by the added−found method. modified silica, polyhexamethylene guanidine, Tiron, metal ions, adsorption preconcentration, determination by atomic emission spectrometry