Determination of metals in natural waters by inductively coupled plasma optical emission spectroscopy after preconcentration on silica sequentially coated with layers of polyhexamethyleneguanidinium and sulphonated nitrosonaphtols

Didukh-Shadrina, S.L.; Losev, V.N.; Samoylo, A.; Trofimchuk, A.K.; Nesterenko, P.N.

Авторы: Didukh-Shadrina S.L., Losev V.N., Samoylo A., Trofimchuk A.K., Nesterenko P.N.
Журнал: International journal of analytical chemistry
Том: 2019
Номер: 1467631
Год издания: 2019
Издательство: Hindawi Pub. Corp.
Местоположение издательства: New York, United States
Первая страница: 1
Последняя страница: 13
DOI: 10.1155/2019/1467631
Аннотация: A series of complexing adsorbents is prepared by coating silica particles with linear polyhexamethylene guanidinium (PHMG) chloride followed by saturation with a number of sulphonated nitrosonaphthols reagents electrostatically retained by positively charged polymer layer. PHMG coated silica is hydrolytically stable even during treatment with 6 M HCl heated up to 50 ∘C. The adsorption of 1-nitroso-2-naphthol-3,6-disulfonic acid (nitroso-R-salt), 2-nitroso-1-naphthol-4-sulfonic acid (nitroso-N-salt), and 2-nitroso-1-naphthol-3,6-disulfonic acid (nitroso-K-salt) on PHMG modified silica was studied. The effective immobilisation of sulphonated nitrosonaphthols was achieved in the range of pH of 3 - 8, while the adsorption of the monosulphonated reagent (nitroso-N-salt) is twice as high as the disulphonated analogues (nitroso-R-salt and nitroso-K-salt). The adsorption of Cu(II), Fe(III), Co(II), Ni(II), Al(III), Zn(II), Pb(II), Mn(II), and Cr(III) on prepared complexing adsorbents under static and dynamic conditions was studied as a function of time, pH, sample volume, and presence of interfering ions. Metal ions can be desorbed by using 1 M HCl or 1 M HNO3. The preconcentration factors of metals under optimized conditions are varied from 20 to 80. The developed method was used for the preconcentration of trace metals fromnatural waters followed by ICP-OES determination. The sub-ppb limits of detection of metals are achieved.
Добавил в систему: Нестеренко Павел Николаевич

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Determination of metals in natural waters by inductively coupled plasma optical emission spectroscopy after preconcentration on silica sequentially coated with layers of polyhexamethyleneguanidinium and sulphonated nitrosonaphtolsстатья

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