Iron(III) ethylenediaminetetraacetate (Fe(III)EDTA) is widely used in iron fortification for reducing iron deficiency, and its determination is urgently needed. The present work developed a fluorescent method to straightforwardly determine Fe(III)EDTA by using photoluminescent carbon dots (C-dots) with the aid of F⁻ ions as the masking agent of free Fe³⁺ ions. In the presence of F⁻ ions, only Fe(III)EDTA selectively quenched the photoluminescence of C-dots, and both Fe³⁺ and Fe²⁺ as well as other carboxylic acids have no effect on the emission of C-dots. The sensing mechanism was attributed to the ligand-tailored electron transfer process from C-dots to Fe³⁺. Under optimum conditions, this method showed a linear calibration plot over the Fe(III)EDTA range of 1.0–200 μmol L⁻¹ and a detection limit of 0.4 μmol L⁻¹. The proposed method was successfully applied to determine Fe(III)EDTA in real samples with acceptable recoveries of spikes (95%−110%) and repeatability (RSD, 4.2%−9.5%).

乙二胺四乙酸铁（III）EDTA被广泛用于铁的强化以减少铁缺乏，因此迫切需要对其进行测定。本开发工作的荧光的方法来确定直截了当的Fe（III）EDTA通过使用光致发光碳点（C-点）与F的援助^-离子作为游离铁的掩蔽剂³⁺离子。在F的存在^-离子，只的Fe（III）EDTA淬灭选择性C-点的光致发光，并且两个铁³⁺和Fe ²⁺以及其它羧酸对C-点的发射没有影响。感应机制归因于配体定制的电子从C点到Fe ^3+的转移过程。在最佳条件下，该方法在1.0–200μmolL ^-1的Fe（III）EDTA范围内显示线性校准图，检出限为0.4μmolL ^-1。所提出的方法成功地用于测定真实样品中的Fe（III）EDTA，具有可接受的加标回收率（95％-110％）和可重复性（RSD，4.2％-9.5％）。