Abstract
This thesis is focused on the development of a new generation of titration reagents based on ionophores with high selectivity and versatility. This platform mainly involved the indicating and chelating nanospheres and the solvent based titration reagents. The chelating nanospheres were obtained by doping high selective ionophores and ion exchanger into the nanospheres. The indicating nanospheres were obtained by doping additionally a hydrophobic pH indicator or a solvatochromic dye into the chelating nanospheres. Based on the ion exchange principle, the amount of the analyte was calculated by the amount of the ion exchanger in the nanospheres added to the sample. Solvent based titration reagents further simplified the analytical procedure, and extended the ionophore choices of this titration scheme. Successful titration examples were demonstrated for Ca2+, Pb2+, Li+, Na+, K+, ClO4- and NO3-. The advantages and disadvantages of these titration reagents as well as the promising research directions were fully discussed.
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