Using organic nanoparticle fluorescence to determine nitrite in water

Lun Wang; Ling Dong; Gui-Rong Bian; Le-Yu Wang; Ting-Ting Xia; Hong-Qi Chen
July 2005
Analytical & Bioanalytical Chemistry;Jul2005, Vol. 382 Issue 5, p1300
Academic Journal
Organic fluorescence nanoparticles (1-aminopyrene nanoparticles) were prepared under ultrasonic radiation and used to determine nitrite. Such nanoparticles have a broad, continuous excitation spectrum, but they are also photochemically stable and water-soluble. Nitrite determination was based upon nitrite quenching the fluorescence of the nanoparticles due to a simple diazotization reaction; a simple and specific method. Under optimal conditions, the linear range of the calibration curve was 20–1400 ng ml−1, with a correlation coefficient of 0.9987 for nitrite. The detection limit was 3 ng ml−1. The method was applied to various water samples from several sources. Quantitative nitrite recoveries and satisfactory results were achieved.


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