Journal
APPLIED SURFACE SCIENCE
Volume 440, Issue -, Pages 1261-1268Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2018.01.156
Keywords
Zeolite; Rhodamine 6G; Test paper; Nitrite sensors; Colorimetry
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Funding
- Kuwait Foundation for the Advancement of Science (KFAS) [P115-12SL-06]
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA) - Thailand [P 1450172]
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In this study, a simple, rapid and relatively less toxic method for rhodamine 6G dye adsorption on hydrogen-form Y-type zeolite for highly selective nitrite detection was demonstrated. The adsorption behavior was described by Langmuir isotherm and the adsorption process reached the equilibrium promptly within a minute. The developed test papers characterized by fluorescence technique display high sensing performance with wide working range (0.04-20.0 mg L-1) and high selectivity. The test papers show good reproducibility with relative standard deviation (RSD) of 7% for five replicated determinations of 3 mg L-1 of nitrite. The nitrite concentration determined by using the test paper was in the same range as using ion chromatography within a 95% confidence level. The test papers offer advantages in terms of low cost and practical usage enabling them to be a promising candidate for nitrite sensor in environmental samples, food, and fertilizers. (C) 2018 Elsevier B.V. All rights reserved.
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