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Potentiometric membrane sensors based on zirconyl(IV) phthalocyanine for detection of sulfosalicylic acid
Shahrokhian, S ; Sharif University of Technology | 2004
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- Type of Document: Article
- DOI: 10.1016/j.talanta.2003.11.007
- Publisher: Elsevier , 2004
- Abstract:
- A metallophthalocyanine complex with zirconium(IV) ion in the center (as an oxo-zirconium, Zr=O, group) was used in poly vinyl chloride (PVC) membranes for the selective detection of 5-sulfosalicylic acid (SSA). The resulting electrodes demonstrate Nernstian responses over a wide range of sulfosalicylic acid concentration (10-6 to 10-1 mol dm-3) with a slope of about -29 mV per decade. The influence of lipophilic ion-exchanger sites on the response properties of the electrodes was investigated. The optimal potentiometric response was observed for the electrode in the presence of about 150 mol% of cationic additive (relative to ionophore) in the phase membrane. The electrodes have a fast response time, micromolar detection limit and good long-term stability (more than 2 months). The feasibility of the application of these sensors for the potentiometric titration of iron in solutions that were prepared from magnetite samples was investigated. © 2003 Elsevier B.V. All rights reserved
- Keywords:
- Ion selective electrodes ; Potentiometry ; Sulfosalicylic acid ; Zirconyl(IV) phthalocyanine
- Source: Talanta ; Volume 63, Issue 2 , 2004 , Pages 371-376 ; 00399140 (ISSN)
- URL: https://www.sciencedirect.com/science/article/abs/pii/S0039914003006623#!