Analytica Chimica Acta, ( ISI ), Volume (589), No (1), Year (2007-2) , Pages (22-32)

Title : A novel flow injection potentiometric graphite coated ion-selective electrode for the low level determination of uranyl ion ( A novel flow injection potentiometric graphite coated ion-selective electrode for the low level determination of uranyl ion )

Authors: Mojtaba Shamsipur , Farhang Mizani , Mir Fazlollah Mousavi , Naader Alizadeh , Kamal Alizadeh , Hossein Eshghi , Hassan Karami ,

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Solution studies on the binding properties of uranyl ion toward four different recently synthesized benzo-substituted macrocyclic diamides L1-L4 revealed the occurrence of a 1:1 complexation of the ligands with UO22+ ion, with a stability order of L2 > L1 > L4 > L3. Consequently, L2 was used as a suitable neutral ionophore for the preparation of novel polymeric membrane (PME) and coated graphite (CGE) UO22+-selective electrodes. The electrodes exhibit a Nernstian behavior for UO22+ ions over wide concentration ranges (1.0 × 10−6–1.0 × 10−1 M for PME and 1.0 × 10−7–1.0 × 10−1 M for CGE) and very low limits of detection (8.0 × 10−7 M for PME and 7.3 × 10−8 M for CGE). The proposed potentiometric sensors manifest advantages of fast response and, most importantly, good selectivity with respect to many alkali, alkaline earth, transition, and heavy metal ions. The potentiometric responses of the electrodes are independent of the pH of the test solution in the pH range 2.9–3.7. The CGE was used in flow injection potentiometry and resulted in well defined peaks for uranyl ions with stable baseline, excellent reproducibility and very high sampling rate of 170 injections per hour. The proposed FIP system was used for the determination of trace uranyl ions in real and synthetic samples.

Keywords

, Uranyl ion, selective electrode; Macrocyclic diamides; Poly(vinyl chloride), membrane; Coated graphite electrode; Flow injection
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@article{paperid:1004682,
author = {Mojtaba Shamsipur and Farhang Mizani and Mir Fazlollah Mousavi and Naader Alizadeh and Kamal Alizadeh and Eshghi, Hossein and Hassan Karami},
title = {A novel flow injection potentiometric graphite coated ion-selective electrode for the low level determination of uranyl ion},
journal = {Analytica Chimica Acta},
year = {2007},
volume = {589},
number = {1},
month = {February},
issn = {0003-2670},
pages = {22--32},
numpages = {10},
keywords = {Uranyl ion-selective electrode; Macrocyclic diamides; Poly(vinyl chloride)-membrane; Coated graphite electrode; Flow injection poetntiometry},
}

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%0 Journal Article
%T A novel flow injection potentiometric graphite coated ion-selective electrode for the low level determination of uranyl ion
%A Mojtaba Shamsipur
%A Farhang Mizani
%A Mir Fazlollah Mousavi
%A Naader Alizadeh
%A Kamal Alizadeh
%A Eshghi, Hossein
%A Hassan Karami
%J Analytica Chimica Acta
%@ 0003-2670
%D 2007

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