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DIVIŠ, P., DOČEKALOVÁ, H.
Originální název
Technika DGT a její použití pro speciační měření v přírodních vodách
Anglický název
Application of DGT technique for speciation measurement in natural waters
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
čeština
Originální abstrakt
Trace metals are measured after accumulation them on a selective binding resin (Chelex-100) after passage through a diffusive polyacrylamide gel of known thickness by DGT (Diffusive gradient in thin films) technique. Metals are continuously removed from solution to the resin in the DGT unit. The concentration of metals in solution is consequently calculated from the mass of metals accumulated in resin during a known time and exposed area. The DGT unit measures the only part of metals available to bind to resin, it means ions and kinetically labile complexes with natural ligands, which can dissociate in the time needed to the diffusion through the gel analogous to ASV measurement. The time available for dissociation of complexes is determinate by the diffusive gel layer thickness. By change of diffusive gel thickness it is possible to determinate which species will be measured according to metal-ligand stability. More accurate speciation measurements can be performed by simultaneously application of two DGT devices one fitted with an open-pore diffusive gel and the other with a partially restricted one. The usage of DGT units fitted with gels of different magnitude of pores allowed separation of large (organic) and small (inorganic) complexes. DGT technique offers many advantages over conventionally used speciation methods. It presents an in situ, very simple, multielementary and preconcentration technique, which can be successfully used for metal speciation in aqueous systems.
Anglický abstrakt
DGT
Klíčová slova v angličtině
DGT, species, natural waters
Autoři
Vydáno
15. 10. 2003
Nakladatel
2Theta
Místo
Český Těšín
ISBN
80-86380-20-3
Kniha
Mikroelementy 2003
Strany od
94
Strany do
97
Strany počet
4
BibTex
@inproceedings{BUT13325, author="Pavel {Diviš} and Hana {Dočekalová}", title="Technika DGT a její použití pro speciační měření v přírodních vodách", booktitle="Mikroelementy 2003", year="2003", pages="4", publisher="2Theta", address="Český Těšín", isbn="80-86380-20-3" }