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Metals determination by microwave digestion ICP-OES of some supplements

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: T. Jurca, E. Marian, M. Braun, L. Vicaș

Editorial: Revista de Chimie, 62(2), p.139-141, 2011.

Rezumat:

ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometry) analysis was applied to assess element
concentrations in six samples of mineral supplements/multivitamins acquired in pharmacies from Romania.
Concentrations of Fe, Ca, Mg, Zn, Li, Ba, Sr, Ni, Cu, Sn, Al, Co, Cr, Mn, Mo, Se, K, Na, Cd, Pb were determined.
The digestion method with acid mixture (HNO3 an H2O2) was used to destroy the organic material. Generally,
the Ca, Fe, K and Mg contents were normal to higher range compared to the labelled quantity. The Cu, Mn, Se,
Ni, Sn and Zn contents were low in most of the formulations when compared to the labelled amounts. Li, Ba,
Sr, Na, Al, Cr, Sr, Co were quantified in some formulations where they were not labelled, this may be due to
the excipients that may have been used in the formulations. The concentration of the toxic elements Pb and
Cd are within the allowed limits. Based on the results obtained in the present study, it is concluded that the
present techniques are adequate for the routine determination of heavy metals concentration in mineral
supplements.

Cuvinte cheie: mineral supplements, heavy metals, microwave digestion ICP-OES