A ‘turn‐on’ fluorescence method for detection of hydrogen peroxide (H₂O₂) in marine food samples is presented in this article. Using this method, a carbon dots (CDs)–MnO₂ probe was formed in which fluorescence intensity (FI) of CDs was quenched through fluorescence resonance energy transfer by addition of MnO₂ nanosheets. When H₂O₂ was added into the CDs–MnO₂ solution, the MnO₂ nanosheets formed Mn²⁺ ions due to a redox reaction between H₂O₂ and MnO₂ nanosheets, and CD FI was recovered. Under optimized conditions, the detection limit for H₂O₂ was 0.87 μM, and analytical linear range was 4–100 μM. Furthermore, this developed fluorescence sensing system was successfully used with satisfactory results to determine trace H₂O₂ content in marine food samples.

中文翻译：

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使用碳点-MnO2探针“打开”荧光检测海洋食品样品中的过氧化氢。

本文介绍了一种用于检测海洋食品样品中过氧化氢（H ₂ O ₂）的“开启”荧光方法。使用这种方法，形成了碳点（CDs）-MnO ₂探针，其中CDs的荧光强度（FI）通过添加MnO ₂纳米片而通过荧光共振能量转移而被淬灭。当将H ₂ O ₂添加到CDs-MnO ₂溶液中时，由于H ₂ O ₂与MnO ₂之间的氧化还原反应，MnO ₂纳米片形成了Mn ²⁺离子。纳米片，并回收CD FI。在优化条件下，H ₂ O ₂的检出限为0.87μM，分析线性范围为4–100μM。此外，该开发的荧光传感系统已成功用于令人满意的结果，以确定海洋食品样品中的痕量H ₂ O ₂含量。