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Luminescent properties of magnesium and calcium 8-hydroxyquinolinates
Petrova D. A.1, Tihkomirova I. Y.
1, Puzyk M. V.
1
1Herzen State Pedagogical University of Russia, St. Petersburg, Russia
Email: petrovadarik@bk.ru, itikhomirova55@mail.ru, puzyk@mail.ru
The dependence of the luminescence intensity of magnesium and calcium 8-hydroxyquinolinates obtained on the paper surface on the type of buffer solution and solvent for 8-hydroxyquinoline was studied. The detection limit of magnesium and calcium cations in an aqueous solution was established: for Mg2+ - 77.8 μg/ml (the highest luminescence intensity was established in an ammonia buffer solution when using a solution of 8-hydroxyquinoline in chloroform); for Ca2+ - 252.2 μg/ml (the highest luminescence intensity was established in a tetraborate buffer solution when using a solution of 8-hydroxyquinoline in ethanol). Regression equations were obtained that make it possible to determine the concentrations of cations (Mg2+, Ca2+) in the solution depending on the luminescence intensity. Keywords: Magnesium and calcium 8-hydroxyquinolinates, luminescence, detection limit.
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