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Potentiometric Response of Solid-State Sensors Based on Ferric Phosphate for Iron(III) Determination

1
Department of Analytical Chemistry, Faculty of Chemistry and Technology, University of Split, R. Boškovića 35, 21000 Split, Croatia
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Department of Chemistry, Faculty of Science, University of Split, R. Boškovića 33, 21000 Split, Croatia
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Department of Inorganic Technology, Faculty of Chemistry and Technology, University of Split, R. Boškovića 35, 21000 Split, Croatia
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Department of Organic Technology, Faculty of Chemistry and Technology, University of Split, R. Boškovića 35, 21000 Split, Croatia
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Faculty of Chemistry and Technology, University of Split, R. Boškovića 35, 21000 Split, Croatia
*
Author to whom correspondence should be addressed.
Academic Editor: Matjaž Finšgar
Sensors 2021, 21(5), 1612; https://doi.org/10.3390/s21051612
Received: 21 January 2021 / Revised: 20 February 2021 / Accepted: 21 February 2021 / Published: 25 February 2021
(This article belongs to the Section Chemical Sensors)
A novel ion-selective electrode with membranes based on iron(III) phosphate and silver sulfide integrated into a completely new electrode body design has been developed for the determination of iron(III) cations. The best response characteristics with linear potential change were found in the iron(III) concentration range from 3.97 × 10−5 to 10−2 mol L−1. The detection limit was found to be 2.41 × 10−5 mol L−1 with a slope of −20.53 ± 0.63 and regression coefficient of 0.9925, while the quantification limit was 3.97 × 10−5 M. The potential change per concentration decade ranged from −13.59 ± 0.54 to −20.53 ± 1.56 for Electrode Body 1 (EB1) and from −17.28 ± 1.04 to −24 ± 1.87 for Electrode Body 2 (EB2), which is presented for the first time in this work. The prepared electrode has a long lifetime and the ability to detect changes in the concentration of iron cations within 20 s. Membrane M1 showed high recoveries in the determination of iron cations in iron(III) standard solutions (98.2–101.2%) as well as in two different pharmaceuticals (98.6–106.5%). This proves that this type of sensor is applicable in the determination of ferric cations in unknown samples, and the fact that all sensor parts are completely manufactured in our laboratory proves the simplicity of the method. View Full-Text
Keywords: ion-selective electrode; potentiometry; iron(III) cations ion-selective electrode; potentiometry; iron(III) cations
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MDPI and ACS Style

Paut, A.; Prkić, A.; Mitar, I.; Bošković, P.; Jozić, D.; Jakić, M.; Vukušić, T. Potentiometric Response of Solid-State Sensors Based on Ferric Phosphate for Iron(III) Determination. Sensors 2021, 21, 1612. https://doi.org/10.3390/s21051612

AMA Style

Paut A, Prkić A, Mitar I, Bošković P, Jozić D, Jakić M, Vukušić T. Potentiometric Response of Solid-State Sensors Based on Ferric Phosphate for Iron(III) Determination. Sensors. 2021; 21(5):1612. https://doi.org/10.3390/s21051612

Chicago/Turabian Style

Paut, Andrea, Ante Prkić, Ivana Mitar, Perica Bošković, Dražan Jozić, Miće Jakić, and Tina Vukušić. 2021. "Potentiometric Response of Solid-State Sensors Based on Ferric Phosphate for Iron(III) Determination" Sensors 21, no. 5: 1612. https://doi.org/10.3390/s21051612

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