Кафедра екології, хімії та хімічної технології

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Відповідальний за розділ: доцент кафедри хімії і хімічної технології ЄФИМЕНКО Валерій Володимирович. E-mail: valerii.yefymenko@npp.nau.edu.ua

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    Electrophysical properties of magnesium citrate (3:2) aqueous solution
    (Продовольчі ресурси. – 2016. №7. – С. 196–205., 2016) Заславський, Олександр Маркович; Козич, Олексій Миколайович; Кустовська, Антоніна Дмитрівна; Козич, Hадія Дмитрівна; Веліканов, Олександр Олександрович
    The great importance for metabolic processes has such element as magnesium. There are different forms of ingress of magnesium to the human body. One of the most effective forms is magnesium citrate. Active using of magnesium citrate as food additive and pharmacological drug demands perfect knowledge and researches of its physicochemical properties and also the effect on human body. The world scientific literature describes two ways of combination of magnesium with citrate-ion. The first, when one magnesium cation is connected with one citrate-ion (1:1). The second one, when 3 magnesium cations are connected with 2 citrate-ions - magnesium citrate (3:2), trimagnesium dicitrate or trimagnesium citrate. The behavior of such compounds hasn’t been researched. The purpose of this study has been to research electrophysical properties of magnesium citrate (3:2) aqueous solutions. Methods: The behavior of magnesium citrate in the aqueous solutions with different concentration has been by the methods of atomic absorption spectrometry (AAS), conductometry and ionometry researched. For the research has been used the powder of magnesium citrate, which has been obtained by the method of aquananotechnology with gross-formula C12H10Mg3O14•14H2O. Results: Identified content of magnesium in analyzed solution has been 0,86 mg/l. In considering of dilution which has been made, it is ascertained the gross-formula of the substance and that 1g of given powder of magnesium citrate contains 86 mg of magnesium (8,6%). The medium of all researched solutions has been weak-acid, near-neutral. By the dilution of the initial solution pH value increases and then decreases to pH of bidistilled water. Value of molar conductivity at infinitely dilution for the magnesium citrate solution has been 534.32 S•cm2/mol, that points at the presence of large quantity of multi-charged particles. Discussion: As the result of the experiment by the method of atomic absorption spectrometry (AAS) the gross-formula of magnesium citrate C12H10Mg3O14•14H2O, which has been obtained by the method of aquananotechnology, has been corroborated in practice. It is ascertained, that the salt is not very soluble in water, forms weak-acid solutions and is dissociable into the large quantity of multi-charged particles