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Determination of microelements in sprouts grown on metal-enriched solutions by ion chromatography

Blicharska E., Komsta Ł., Kocjan R., Gumieniczek A., Kloc A., Kaźmierczak J.

Acta Chromatographica

2014

Vol. 26, no. 4

739--747

The paper discusses a possibility to grow seeds on solutions of microelements and application of sprouts enriched in such a way as an alternative to commercial dietary supplements. It contains a short review of the approaches reported till now and a systematic experimental study, carried on the most frequently used seeds (Lens culinaris, Helianthus annuus, Vigna radiata, Glycine max, and Lepidium sativum).Seven metals (Fe, Cu, Zn, Ni, Co, Cd, and Mn) were studied. Seeds were grown on cellulose in 20°C temperature using deionized water enriched with metals in concentrations: 100, 50, 25, 12.5, 6.25, and 3.125 mg/L in a period of 4 days. The reference samples were the seeds grown on pure deionized water. Sprouts were mineralized by microwave radiation, and the metal content was quantified by ion chromatography with on-line post-column derivatization and spectrophotometric detection.The conclusions can be treated as general recommendations, which seeds should be grown and what concentrations of metals in solutions should be applied to provide good enrichment and to avoid risk of microelement overdose.

Analysis of some metal ions using LiChroprep RP-8 and LiChroprep RP-18 modified with zincon as a sorbent

Kocjan R., Sowa I., Blicharska E.

Chemia Analityczna

2002

Vol. 47, No. 2

219-227

Two new chelating sorbents for metal, ions were prepared by the impregnation of chemically modified silica LiChroprep RP-8 and RP-18 with ion pairs composed of cation of Aliquat 336 and anion of Zincon. The hypothetical molecular mechanism of binding of this ion pair by the surface of the applied carrier was presented. Higher stability of these two sorbents in comparison to that based on plain silica chelating sorbent was demonstrated. The sorbents were applied for chromatographic separations of some mixtures of metal ions, purification of Mg salts from trace amounts of Ca, and for additional purification of the aqueous solutions of alkali metals from trace amounts of heavy metals (Zn, Pb, Cd and Cu). The multiple use of the sorbents based on RP-8 and RP-18 in sorption-desorption process of metal ions without deterioration of their sorption capacities is demonstrated.

Przez impregnację modyfikowanych żeli krzemionkowych — LiChroprepu RP-8 i LiChro-prepu RP-18 parami jonowymi złożonymi z kationu z Aliquatu 336 i anionu z Cynkonu, otrzymano 2 nowe sorbenty chelatujące jony metali. Przedstawiono schematycznie hipotetyczny mechanizm wiązania tych par przez powierzchnię stosowanych nośników. Wykazano większątrwalość otrzymanych sorbentów w porównaniu z sorbentem zawierającym zwykły żel krzemionkowy. Otrzymane sorbenty zastosowano do chromatograficznego rozdzielania mieszanin jonów wybranych metali, oczyszczania soli magnezu od jonów wapnia oraz do dodatkowego oczyszczania soli metali alkalicznych od jonów metali ciężkich (Zn, Pb, Cd i Cu). Stwierdzono możliwość wielokrotnego stosowania tych sorbentów w procesach sorpcji i desorpcji jonów metali bez zmniejszania ich pojemności sorpcyjnej.