Development of a novel PVC-membrane fluorescent sensor based on N,N鈥?bis(dansylamidoethyl)-N,N鈥?bis(2-pyridylmethyl)propylene-diamine as a new fluoroionophore for highly sensitive and selective monitoring of trace amounts of La³⁺ ions in aqueous solutions

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• 作者：Mojtaba Shamsipur ; Moslem Mohammadi ; Avat (Arman) Taherpour ; Vito Lippolis ; Riccardo Montis
• 关键词：Optical sensor ; Poly(vinyl chloride) membrane ; Fluoroionophore ; Selective La3+ detection ; Fluorescence quenching
• 刊名：Sensors and Actuators B: Chemical
• 出版年：1 March, 2014
• 年：2014
• 卷：192
• 期：Complete
• 页码：378-385
• 全文大小：1578 K

文摘

A new fluorescent sensor for the highly sensitive and selective determination of La³⁺ ion is developed. The sensing membrane was prepared by incorporating N,N鈥?bis(dansylamidoethyl)-N,N鈥?bis(2-pyridylmethyl)propylenediamine (L) as fluoroionophore in the plasticized PVC membrane containing o-NPOE as plasticizer. The proposed sensor displays a wide calibration range of 5.0 脳 10^鈭? to 5.0 脳 10^鈭? M with a low limit of detection of 2.0 脳 10^鈭? M in a solution of pH 6.0. This sensor has a relatively fast response time of less than 2 min. In addition to high stability and reproducibility, it shows a unique selectivity toward La³⁺ ion with respect to common coexisting cations. The sensor can be regenerated by exposure to a solution of EDTA. The proposed sensor was successfully applied to the determination of La³⁺ in aqueous solutions.