Journal
ANALYTICA CHIMICA ACTA
Volume 651, Issue 2, Pages 227-233Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2009.09.006
Keywords
Trace mercury; Fluorescent sensor; Detection; Separation; Serum
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Funding
- National Natural Science Foundation of China [20536010]
- Science and Technology Foundation of Shanghai [06JC14021, 073919109]
- Program of Shanghai Subject Chief Scientist [07XD14009]
- Shanghai Leading Academic Discipline Project [13507]
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In this work, a reusable bifunctional fluorescent sensor for simultaneous detection and separation of trace Hg2+ in water and serum, which contains a naphthalimide derivative of 2,6-bis(aminomethyl)pyridine covalently grafted to the surface of silica particles, was developed Meanwhile the fluorescence characteristics and the adsorbent properties of the sensor were investigated in detail. This sensor showed a very good linearity (correlation coefficient of R-2 = 0.9991) in the range 0.1-1 mu M of Hg2+ with detection limits lower than 6.8 x 10(-9) M. It can also be used as an adsorbent for the removal of mercuric ions from the contaminated aqueous Solution. The regeneration of this sensor is very simple, only by modulating the pH value of the aqueous Solution. It can be reused at least four cycles. In addition, the present approach has the advantages of rapidity. simplicity, and low cost. We believe that this approach may serve as a foundation for the preparation of practical fluorescent sensor for the rapid detection of Hg2+ in aqueous biological and environmental samples. (C) 2009 Elsevier B.V. All rights reserved.
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