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.

中文翻译：

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亮蓝的灵敏的检测使用具有YVO荧光共振能量转移₄：Eu的纳米晶体作为供体†

建立了一种基于荧光共振能量转移的亮蓝（BB）检测方法，其中YVO ₄：Eu纳米晶体（NCs）被用作能量供体，而BB被用作能量受体。可以将BB与YVO ₄：Eu NCs静电结合，并淬灭纳米晶体的荧光。在最佳条件下，YVO ₄：Eu NCs的荧光强度的对数与BB浓度成线性比例，范围为2.5×10 ^-6 –2.5×10 ^-4和2.5×10 ^-4 –2.5×10 ^-3 g L ^-1。检测下限为1.0×10 ^-6 g L ^-1。该方法已成功应用于果汁和糖果中的BB检测。该方法具有许多优势，例如YVO ₄：Eu NC的简便合成，简单快速的定量程序和具有竞争力的分析性能。