期刊
TALANTA
卷 154, 期 -, 页码 278-283出版社
ELSEVIER
DOI: 10.1016/j.talanta.2016.03.067
关键词
Fluorescent probe; Metal ions; Masking reagent; Hg2+ and Cu2+; Detection
资金
- National Nature Science Foundation of China [21475080]
- Nature Science Foundation of Shanxi Province [2014011016-2]
- Shanxi Scholarship Council of China [2014-018]
- Postdoctoral Science Foundation of China [2013M530120]
A new Schiff base fluorescent probe, 2-(4-(diphenylamine)benzylidene) thiosemicarbazide (DPBT), was synthesized and its sensing behavior to metal ions were studied by UV-vis and fluorescence spectra. The results show that DPBT can detect Hg2+ sensitively and selectively in weakly acidic and neutral conditions, they form a complex with 2:1. The linear range was 0.095-1.14 mu M and the detection limit was 0.15 nM. In weakly alkaline conditions, DPBT can interaction with Hg2+ and Cu2+ at the same time. We use masking reagent, NaBH4, to reduce Hg2+ to Hg degrees, the detection of Cu2+ were achieved. They formed 1:1 complex with the binding constant of 4 x 10(4) M-1, a good linear relationship in 0.45-3.6 mu M and the detection limit of 0.17 mu M. The proposed method was used to determine Hg2+ and Cu2+ in tap water and waste water samples. (c) 2016 Elsevier B.V. All rights reserved.
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