Journal
TALANTA
Volume 91, Issue -, Pages 65-71Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2012.01.013
Keywords
Rhodamine B; Mercuric ion; Optical membrane; Flow system; Fluorescent enhancement
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Funding
- National Natural Science Foundation of China [20927007, 20803050]
- Science Research Foundation of Chongqing University of Arts and Sciences [Z2010HH12]
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A novel prepared mercuric ion PVC membrane sensor based on a Rhodamine B derivative (RND) as a selective sensing material was described. The sensor exhibited a specific fluorescent off-on response to Hg2+, and showed a linear response over the Hg2+ concentration range from 1.0 x 10(-9) to 2.0 x 10(-3) M with a very low detection limit of 8.1 x 10(-10) M in bulk method. The sensor has also been incorporated into a flow-cell for determination of Hg2+ in flowing streams with improved sensitivity and detection limit. The sensor shows excellent selectivity toward Hg2+ with respect to common coexisting cations. The proposed fluorescence optode was successfully applied to detect Hg2+ in environmental water samples and fish. (C) 2012 Elsevier B.V. All rights reserved.
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