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Sensors 2003, 3(10), 424-437; doi:10.3390/s31000424
Article

A Novel Coated Graphite Rod Th(IV) Ion Selective Electrode Based On Thorium Oxinate Complex and Its Application

1,* , 2 and 1
Received: 13 July 2003; Accepted: 14 September 2003 / Published: 31 October 2003
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Abstract: Preparation, characterization, and application of a novel coated graphite rod thorium selective electrode based on thorium 8-hydroxyquinolate [thorium oxinate, Th(C9H6NO)4.2H2O] complex ionophore as a sensing material, dioctylphthalate (DOP) as a solvent mediator, and PVC as a matrix have been developed. The coated graphite rod electrode exhibits a linear Nernstian response over the concentration range 5x10-6 - 1x10-1 mol l-1 of Th(IV) ions, with a calibration slope of 15.5 ± 0.5 mV/concentration decade and a detection limit of 1.6x10-6 mol l-1. It has a fast response time and can be used for a period of two months without any divergence in potentials. The proposed electrode reveals a good selectivity for Th(IV) cation over a varity of other cations and could be used in the pH range of (3 - 5). The sensor was successfully applied in the determination of thorium in real (monazite sand) sample. The average recovery obtained is ranging from 97.0 to 93.4% with standard deviation of 1.5% (n=8).
Keywords: Thorium ion-selective electrode; PVC membrane; Thorium oxinate complex; Potentiometry; Coated graphite rod Thorium ion-selective electrode; PVC membrane; Thorium oxinate complex; Potentiometry; Coated graphite rod
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Arida, H.A.; Ahmed, M.A.; El-Saied, A.M. A Novel Coated Graphite Rod Th(IV) Ion Selective Electrode Based On Thorium Oxinate Complex and Its Application. Sensors 2003, 3, 424-437.

AMA Style

Arida HA, Ahmed MA, El-Saied AM. A Novel Coated Graphite Rod Th(IV) Ion Selective Electrode Based On Thorium Oxinate Complex and Its Application. Sensors. 2003; 3(10):424-437.

Chicago/Turabian Style

Arida, Hassan A.; Ahmed, Mona A.; El-Saied, Abeer M. 2003. "A Novel Coated Graphite Rod Th(IV) Ion Selective Electrode Based On Thorium Oxinate Complex and Its Application." Sensors 3, no. 10: 424-437.


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