Using silica modified by poly(hexamethylene guanidine) and nitroso-R-salt for the preconcentration and determination of cobalt

Тип публикации: статья из журнала

Год издания: 2015

Идентификатор DOI: 10.1134/S1061934815060064

Ключевые слова: silica, poly(hexamethylene guanidine), nitroso-R-salt, cobalt, cobalt, nitroso-R-salt, poly(hexamethylene guanidine), silica, Adsorbents, Cyclohexane, Nitrogen compounds, Silica, Limit of detection, Nitroso-R salt, Partition coefficient, Performance characteristics, Photometric determinations, poly(hexamethylene guanidine), Pre-concentration, Surface concentration, Cobalt

Аннотация: An adsorbent based on silica consecutively modified with poly(hexamethylene guanidine) and nitroso-R-salt is proposed for the adsorption preconcentration and photometric determination of cobalt. The approach gives adsorbents with the controlled surface concentration of the reagent. The adsorbent extracts cobalt(II) from solutions of pH 5-9 with partition coefficients of 5x10(3)-1 x 10(4) cm(3)/g. The specific features of the influence of Fe(II) and Fe(III) on the preconcentration and determination of cobalt are considered. The interference with Fe(II) is eliminated by its oxidation to Fe(III). It is shown that the performance characteristics of the procedures depend on the surface concentration of the reagent. The limit of detection for cobalt is 0.01 mu g per 0.1 g of the adsorbent. The developed procedures were used for the determination of mobile cobalt species in soils.

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Издание

Журнал: JOURNAL OF ANALYTICAL CHEMISTRY

Выпуск журнала: Vol. 70, Is. 6

Номера страниц: 677-684

ISSN журнала: 10619348

Место издания: NEW YORK

Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER

Авторы

  • Losev V.N. (Siberian Fed Univ, Kristall Res & Engn Ctr, Krasnoyarsk 660041, Russia)
  • Didukh S.L. (Siberian Fed Univ, Kristall Res & Engn Ctr, Krasnoyarsk 660041, Russia)
  • Mukhina A.N. (Siberian Fed Univ, Kristall Res & Engn Ctr, Krasnoyarsk 660041, Russia)
  • Trofimchuk A.K. (Taras Shevchenko Natl Univ, Fac Chem, UA-01033 Kiev, Ukraine)

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