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Titles listIon-Selective Optode Nanospheres as Heterogeneous Indicator Reagents in Complexometric Titrations
Titles listIon-Selective Optode Nanospheres as Heterogeneous Indicator Reagents in Complexometric Titrations
Scientific Article
unige:75943 
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Ion-Selective Optode Nanospheres as Heterogeneous Indicator Reagents in Complexometric Titrations |
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| Authors | ||
| Published in | Analytical Chemistry. 2015, vol. 87, no. 5, p. 2827-2831 | |
| Abstract | Traditionally, optical titrations of inorganic ions are based on a rapid and visible color change at the end point with water-soluble organic dyes as indicators. Adequate selectivity is required for both the indicator and the complexing agent, which is often limited. We present here alternative, heterogeneous ionophore-based ion-selective nanospheres as indicators and chelators for optical titrations. The indicating nanospheres rely on a weaker extraction of the analyte of interest by ion-exchange, owing to the additional incorporation of a lipophilic pH indicator in the nanosphere core. Ca2+ titration was demonstrated as a proof-of-concept. Both the chelating and the indicating nanospheres showed good selectivity and a wide working pH range. | |
| Identifiers | DOI: 10.1021/ac504213q | |
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| Research group | Groupe Bakker | |
| Citation (ISO format) | ZHAI, Jingying, XIE, Xiaojiang, BAKKER, Eric. Ion-Selective Optode Nanospheres as Heterogeneous Indicator Reagents in Complexometric Titrations. In: Analytical Chemistry, 2015, vol. 87, n° 5, p. 2827-2831. doi: 10.1021/ac504213q https://archive-ouverte.unige.ch/unige:75943 |
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