Journal article
Ion-Selective Optode Nanospheres as Heterogeneous Indicator Reagents in Complexometric Titrations
Analytical Chemistry, Vol.87(5), pp.2827-2831
2015
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.
Details
- Title
- Ion-Selective Optode Nanospheres as Heterogeneous Indicator Reagents in Complexometric Titrations
- Authors
- Jingying Zhai (Author) - University of Geneva, SwitzerlandXiaojiang Xie (Author) - University of Geneva, SwitzerlandEric Bakker (Author) - University of Geneva, Switzerland
- Publication details
- Analytical Chemistry, Vol.87(5), pp.2827-2831
- Publisher
- American Chemical Society
- Date published
- 2015
- DOI
- 10.1021/ac504213q
- ISSN
- 0003-2700
- Organisation Unit
- University of the Sunshine Coast, Queensland
- Language
- English
- Record Identifier
- 99450085302621
- Output Type
- Journal article
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- Web Of Science research areas
- Chemistry, Analytical