Article

Chelating sorbents based on silica gel and their application in atomic spectrometry

Department of Analytical Chemistry, University of Córdoba, Campus de Rabanales, Edificio Marie Curie, 14071, Córdoba, Spain.
Analytical and Bioanalytical Chemistry (Impact Factor: 3.44). 04/2005; 381(6):1103-13. DOI: 10.1007/s00216-004-3022-2
Source: PubMed

ABSTRACT

This mini-review covers chelating sorbents anchored to silica gel and their analytical applications for the preconcentration, separation and determination of trace metal ions, focussing mainly on the last 20 years. The article summarizes also the experience gathered by our research group in the synthesis and characterization of new modified silica gels "via silanization", and their affinity toward selective extraction and separation of trace elements. The introduction of 1,5-bis(di-2-pyridyl)methylene thiocarbohydrazide silica gel (DPTH-gel) and methylthiosalicylate silica gel (TS-gel) chelating sorbents in trace and ultratrace analysis provide vital breakthroughs in preconcentration methods. These home-made materials allow certain analytes to be selectively extracted from complex matrices without matrix interference and good detection limits. The advantages of these new chelating sorbents in comparison with 8-hydroxyquinoline chelating sorbent immobilized on silica gel are discussed.

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    • "These advantages include high degree of selectivity by controlling the pH, versatility, durability and good metal loading capacity and enhanced hydrophilicity[8]. Chelating ligands have been functionalized in several materials, such as silica- gel[9], polyurethane foam[10], cellulose[11] and styrene-divinylbenzene copolymer, commercially available as "

    Full-text · Article · Aug 2014
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    • "The organic-inorganic polymeric sorbents are known for their excellent surface characteristics for the effective adsorption of metals. For example, the preconcentration and separation of elements by using the chelating silicon-organic polymers have been reported [5] [6] [7]. However, most of chelating silicon polymers are used for preconcentration and determination of noble metal ions, and their synthesis of silica organic polymers usually takes a long time and synthetic process is complicated. "
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    Full-text · Dataset · May 2014
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    • "The organic-inorganic polymeric sorbents are known for their excellent surface characteristics for the effective adsorption of metals. For example, the preconcentration and separation of elements by using the chelating silicon-organic polymers have been reported [5] [6] [7]. However, most of chelating silicon polymers are used for preconcentration and determination of noble metal ions, and their synthesis of silica organic polymers usually takes a long time and synthetic process is complicated. "
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