期刊
TALANTA
卷 106, 期 -, 页码 261-265出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2012.10.078
关键词
Rhodamine B derivative; Iron(III); Fluorescence; Quenching
资金
- National Nature Scientific Foundation of China [20975085, 21175112]
A new method for determination of iron(III) has been developed using a kind of rhodamine B derivative fluorescent probe, rhodamine amide (RHA), in acidic HAc-NaAc buffer solution. In this approach, the heavy atom effect of I-3(-) was applied to quench the fluorescence of RHA. When iron(III) and KI coexisted in HAc-NaAc buffer solution, iron(III) reacted with the excess KI to produce I-3(-) that quenched the fluorescence of RHA through the formation of a non-fluorescence compound. The results showed that the fluorescence intensity decrease of RHA presented a good linear relationship with the iron(III) concentrations in the range from 0.5 to 5.0 mu mol L-1 with the correlation coefficient of 0.9970, and the detection limit was 0.3 mu mol L-1 iron(III). The approach was applied to determination of iron(III) in water samples, and the recovery was found to be from 80.7% to 100. 8%. (C) 2012 Elsevier B.V. All rights reserved.
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