Sensitive detection of Brilliant Blue using fluorescence resonance energy transfer with YVO₄:Eu nanocrystals as donors
2018
Yu, Yongli | Niu, Jianli | Li, Wei | Liu, Haixia | Wang, Meng
An approach for Brilliant Blue (BB) detection was established based on fluorescence resonance energy transfer, where YVO₄:Eu nanocrystals (NCs) are used as the energy donors and BB as the energy acceptor. BB could be electrostatically combined with the YVO₄:Eu NCs and the fluorescence of the nanocrystals was quenched. Under optimal conditions, the logarithm of fluorescence intensity of the YVO₄:Eu NCs was linearly proportional to the BB concentration in the ranges of 2.5 × 10⁻⁶–2.5 × 10⁻⁴ and 2.5 × 10⁻⁴–2.5 × 10⁻³ g L⁻¹. The limit of detection was 1.0 × 10⁻⁶ g L⁻¹. The method was successfully applied for BB detection in juices and candies. This method has a number of advantages, such as the facile synthesis of YVO₄:Eu NCs, a simple and quick quantitative procedure and competitive analytical performance.
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