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Functionalized gold nanoparticles for the detection of nitrates in water

Mura, Stefania and Greppi, Gianfranco and Roggero, Pier Paolo and Musu, Elodia and Pittalis, Daniele and Carletti, Alberto and Ghiglieri, Giorgio and Irudayaraj, Joseph (2015) Functionalized gold nanoparticles for the detection of nitrates in water. International Journal of Environmental Science and Technology, Vol. 12 (3), p. 1021-1028. ISSN 1735-1472. eISSN 1735-2630. Article.

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DOI: 10.1007/s13762-013-0494-7

Abstract

A rapid and sensitive colorimetric assay was developed using cysteamine modified gold nanoparticles for the direct detection of nitrates in water samples. Gold nanoparticles stabilized with citrate were modified with cysteamine that has excellent affinity for nitrates, and its capacity to capture nitrates was evaluated, in comparison with other anions. The presence of nitrates in water samples could be tracked by naked eye with a color variation of the colloidal suspension from red to gray, and these results were confirmed through ultraviolet–visible measurements within a nitrate concentration of 35 ppm. In field analysis was performed in underground water extracted from wells during the year 2012 in Arborea area (Italy), a nitrate vulnerable zone, and information of nitrate concentration in the range of the recommended nitrate level in water was studied. This simple assay can be used for onsite detection of nitrates in water without the need for skilled personnel, sample pretreatment or expensive instrumentation.

Item Type:Article
ID Code:10121
Status:Published
Refereed:Yes
Uncontrolled Keywords:Nanoparticles, nitrates, ultraviolet–visible, colorimetric test kit, water
Subjects:Area 04 - Scienze della terra > GEO/05 Geologia applicata
Area 07 - Scienze agrarie e veterinarie > AGR/02 Agronomia e coltivazioni erbacee
Area 07 - Scienze agrarie e veterinarie > AGR/19 Zootecnica speciale
Divisions:001 Università di Sassari > 02 Centri > Centro interdipartimentale Nucleo di ricerca sulla desertificazione
001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Agraria
001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Scienze della Natura e del Territorio
Publisher:Springer
ISSN:1735-1472
eISSN:1735-2630
Copyright Holders:© Islamic Azad University (IAU) 2014
Deposited On:22 Sep 2014 16:12

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