Journal
ANALYTICA CHIMICA ACTA
Volume 631, Issue 1, Pages 91-95Publisher
ELSEVIER
DOI: 10.1016/j.aca.2008.10.037
Keywords
Chemodosimeter; Fluorescein; Sulfide anion; Fluorescence
Categories
Funding
- The Education Department of Shaanxi Province of China [07JK406]
- The Natural Science Foundation of Shaanxi Province of China
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A highly sensitive chromo- and fluorogenic chemodosimeter for sulfide anion was developed based on its nucleophilicity. 2,4-Dinitrobenzenesulfoulyl-fluorescein (1) is a weakly fluorescent compound. Upon mixing with Sulfide anion in aqueous acetone solution, the 2,4-dinitrobenzenesulfonyl group off was efficiently removed and highly fluorescent fluorescein was released, hence leading to the dramatic increases in both fluorescence and absorbance of the reaction Solution. The fluorescence increment is linear with sulfide anion concentration in the range 50-1000 nmol L-1 with a detection limit of 4.3 nmol L-1 (3 sigma). The proposed chemodosimeter showed excellent selectivity toward sulfide anion and was successfully applied to the determination of sulfide anion in synthetic wastewater samples. (C) 2008 Elsevier B.V. All rights reserved.
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