Study of a novel bisnaphthalimidopropyl polyamine as electroactive material for perchlorate-selective potentiometric sensors.

Gil, Renato; Amorim, C�lia G.; Crombie, Laura; Kong Thoo Lin, Paul; Ara�jo, Alberto; da Concei��o Montenegro, Maria

Abstract

In this work, the new polyamine bisnaphthalimidopropyl-4,4'-diaminodiphenylmethane is proposed as a new ionophore for perchlorate potentiometric sensors. The optimal formulation for the membrane comprised of 12mmolkg-1 of the ionophore, and 68% (w/w) of 2-nitrophenyl phenyl ether as plasticizer and 31% (w/w) of high molecular weight PVC. The sensors were soaked in water for a week to allow leakage of anionic impurities and for one day in a perchlorate solution (10-4molL-1) to improve reproducibility due to its first usage. The stability constant for the ionophore-perchlorate association in the membrane, log βIL1=3.18±0.04, ensured a performance characterized by the slope of 54.1 (±0.7) mVdec-1 to perchlorate solutions with concentrations between 1.24×10-7 and 1.00×10-3molL-1. The sensors are insensitive to pH between 3.5 to 11.0, they have a practical detection limit of 7.66 (±0.42) ×10-8molL-1 and a response time below 60s for solutions with perchlorate concentrations above 5×10-6molL-1. The accuracy of the results was confirmed by the analysis of the contaminant in a certified reference water sample.

Citation

GIL, R., AMORIM, C.G., CROMBIE, L., KONG THOO LIN, P., ARUJO, A. and da CONCEICAO MONTENEGRO, M. 2015. Study of a novel bisnaphthalimidopropyl polyamine as electroactive material for perchlorate-selective potentiometric sensors. Electroanalysis [online], 27(12), pages 2809-2819. Available from: https://doi.org/10.1002/elan.201500275

• Journal Article Type: Article
• Acceptance Date: Jun 20, 2015
• Online Publication Date: Jul 16, 2015
• Publication Date: Dec 31, 2015
• Deposit Date: Sep 19, 2016
• Publicly Available Date: Sep 19, 2016
• Journal: Electroanalysis
• Print ISSN: 1040-0397
• Electronic ISSN: 1521-4109
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 27
• Issue: 12
• Pages: 2809-2819
• DOI: https://doi.org/10.1002/elan.201500275
• Keywords: Bisnaphthalimidopropyl polyamine; Potentiometry; Sensors; Perchlorate; Waters
• Public URL: http://hdl.handle.net/10059/1778
• Contract Date: Sep 19, 2016