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Sensitive naked eye detection and quantification assay for nitrite by a fluorescence probe in various water resources
Fengyuan Zhang1, Xinyue Zhu2, Zhijuan Jiao2
1College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China; School of Basic Medical Science, Ningxia Medical University, Yinchuan 750004, China.
Abstract:
An uncontrolled increase of nitrite concentration in groundwater, rivers and lakes is a growing threat to public health and environment. It is important to monitor the nitrite levels in water and clinical diagnosis. Herein, we developed a switch-off fluorescence probe (PyI) for the sensitive detection of nitrite ions in the aqueous media. This probe selectively recognizes nitrite ions through a distinct visual color change from colorless to pink with a detection limit of 0.1 μM. This method has been successfully applied to the determination of nitrites in tap water, lake water and Yellow River water with recoveries in the range of 94.8%-105.4%.
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