Abstract
Article history: Received January 26, 2013 Received in Revised form May 10, 2013 Accepted 28 May 2013 Available online 2 June 2013 In this study, for the first time we report a highly selective and sensitive lutetium ions chemical optical sensor based on immobilization of a asymmetrically S–N Schiff’s base, namely N(thien-2-ylmethylene)pyridine-2,6-diamine (TPD) on a triacetylcellulose membrane. This optode exhibits a linear range of 5.0 ×10 –1.0 ×10 M of the Lu(III) ion concentration with a detection limit of 9.3 ×10 M at a wavelength of 336 nm. The influence of responsible factors for improving sensitivity of the sensor was studied and identified. Response time of the newly designed optode was within 20-30 s depending on the Lu(III) ion concentration. Response of the optical sensor is independent of the pH of the solution in the range of 3.0–9.0. It manifests advantages of fast response time, low detection limit and most significantly, very good selectivity with respect to a number of lanthanide ions. The sensor can readily be regenerated with thiourea solutions and its response was reversible and reproducible. This optode was applied to the determination of Lu(III) in aqueous and CRM samples. © 2013 Growing Science Ltd. All rights reserved.
Highlights
Lutetium is one of the rare earth elements (REEs) that can be found in houses in equipments such as fluorescent lamps, energy-saving lamps, color televisions and glasses
For the first time we report a highly selective and sensitive lutetium ions chemical optical sensor based on immobilization of a asymmetrically S–N Schiff’s base, namely N(thien-2-ylmethylene)pyridine-2,6-diamine (TPD) on a triacetylcellulose membrane
Transparent triacetylcellulose optode were produced from waste photographic film tapes, which were previously treated with commercial sodium hypochlorite for several seconds in order to remove the colored gelatinous layers
Summary
Lutetium is one of the rare earth elements (REEs) that can be found in houses in equipments such as fluorescent lamps, energy-saving lamps, color televisions and glasses. Besides Lu(III) potentiometric ion-selective electrodes which have been already reported[13,14,15,16], can be proper for the Lu(III) assessment, as they may be incorporated into low cost, easy to use kits. They can offer the required selectivity and sensitivity for the environmental monitoring[17,18,19,20,21,22]. The proposed method offers a more selective and sensitive method for Lu(III) analysis in real samples with lower detection limit in comparison with to the other reported methods
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