Тип публикации: статья из журнала
Год издания: 2015
Идентификатор DOI: 10.1134/S1061934815060064
Ключевые слова: silica, poly(hexamethylene guanidine), nitroso-R-salt, cobalt, Adsorbents, Cyclohexane, Nitrogen compounds, Limit of detection, Nitroso-R salt, Partition coefficient, Performance characteristics, Photometric determinations, Pre-concentration, Surface concentration
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 oПоказать полностьюf 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.
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