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Fluorescent Determination of Mercury(II) Using Rhodamine B Immobilized on Polystyrene Microspheres

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journal contribution
posted on 2017-06-22, 20:25 authored by Ling Leng, Yi Li, Yuanyuan Liu, Fangshi Li, Xiaohui Xiong

A novel microsphere-based fluorescent sensor 1 for determination of Hg(II) in food samples has been successfully synthesized and its fluorescent sensing properties were investigated in detail. Polystyrene microsphere was innovatively surface modified by a rhodamine derivative; therefore sensor 1 was a fluorescent sensor with high polymer material properties of polystyrene and the optical properties of a fluorescent probe. Sensor 1 displayed high selectivity, good anti-interference performance, and instantaneous response to Hg(II). The fluorescence intensity of sensor 1 showed a linear response to Hg(II) in the concentration range of 0 µM to 8 µM with a detection limit of 0.439 µM. The most valuable advantage was that sensor 1 was recyclable and environmentally-friendly. This proposed sensor 1 was applied to monitor the content of Hg(II) in real food samples, such as tap water, rice, and anglerfish. The recovery range of tap water was from 92.60 to 105.80%, the recovery range of rice was from 90.45 to 106.10%, and the recovery range of anglerfish was from 91.30 to 105.84%. The relative error was below 10% in spiked recovery studies, suggesting that fluorescent sensor 1 provides a simple, efficient, and promising method for determination of Hg(II) in complex matrices.

Funding

This work is supported by the Natural Science Foundation of Jiangsu Province in China (BK20161542) and the University Science Research Project of Jiangsu Province in China (16KJB550005).

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