| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1163930 | Analytica Chimica Acta | 2014 | 6 Pages |
•A fluorescence turn-on method for trace amounts of UO22+ has been developed.•The method was based on aggregation induced emission enhancement (AIEE) mechanism.•The AIEE was linearly related to 1–25 ppb UO22+, with LOD of 0.2 ppb.•The method could be utilized in quantifying UO22+ in fuel processing wastewaters.
A sensitive fluorescence turn-on method for trace amounts of uranyl ion (UO22+) in solution has been developed in this study, based on aggregation induced emission enhancement (AIEE) characteristics of 4-pethoxycarboxyl salicylaldehyde azine (PCSA) induced by complex interaction between UO22+ and PCSA. Under optimized conditions, a fluorescence enhancement at 540 nm could be observed, which was linearly related to the concentration of UO22+ in the range of 1–25 ppb (part per billion). Analytical data showed that a detection limit of 0.2 ppb was achieved with the relative standard deviation (R.S.D.) 1.3% (n = 5). The proposed method was successfully utilized in quantifying UO22+ in fuel processing wastewaters.
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