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Development of sulfur doped carbon quantum dots for highly selective and sensitive fluorescent detection of Fe2+ and Fe3+ ions in oral ferrous gluconate samples.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy ( IF 4.3 ) Pub Date : 2019-10-08 , DOI: 10.1016/j.saa.2019.117602 Fuyou Du 1 , Zhenfang Cheng 2 , Wei Tan 3 , Lingshun Sun 2 , Guihua Ruan 2
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy ( IF 4.3 ) Pub Date : 2019-10-08 , DOI: 10.1016/j.saa.2019.117602 Fuyou Du 1 , Zhenfang Cheng 2 , Wei Tan 3 , Lingshun Sun 2 , Guihua Ruan 2
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Sulfur-doped carbon quantum dots (S-CQDs) with stable blue fluorescence were synthesized through a facile one-step hydrothermal method by using ascorbic acid and thioglycolic acid as carbon and sulfur sources. The prepared S-CQDs exhibited a sensitive and selective response to Fe3+ ions in comparison with Fe2+ and other metal ions, In the presence of adequate H2O2, Fe2+ was completely transformed to Fe3+ that is the determinable form of iron ions, and the difference in the change of the fluorescence intensity of S-CQDs before and after adding H2O2 was used for detection of Fe2+ and Fe3+ ions, respectively. Under the optimum experimental conditions, the fluorescence intensity of S-CQDs gradually decreased with increasing of Fe3+ concentration ranging from 0 to 200 μM. Good linearity was achieved over the range of 0-200 μM. The detection limit of the developed method was 0.050 μM for Fe3+. The recoveries of Fe2+ and Fe3+ spiked in real samples ranged from 98.2% to 112.4%. Finally, the proposed S-CQDs integrated with Fenton system was applied to the detection of Fe2+ and Fe3+ ions in oral ferrous gluconate samples, which presents potential applications in the speciation and determination of Fe2+ and Fe3+ ions in complex samples.
中文翻译：
开发了用于高选择性和灵敏荧光检测口腔葡萄糖酸亚铁样品中Fe2 +和Fe3 +离子的硫掺杂碳量子点。
以抗坏血酸和巯基乙酸为碳源和硫源，通过简便的一步水热法合成了具有稳定蓝色荧光的硫掺杂碳量子点（S-CQDs）。与Fe2 +和其他金属离子相比，制备的S-CQD对Fe3 +离子表现出敏感和选择性的反应。在存在足够的H2O2的情况下，Fe2 +完全转化为Fe3 +，这是铁离子的可确定形式，并且S-CQDs加入H2O2前后的荧光强度变化分别用于检测Fe2 +和Fe3 +离子。在最佳实验条件下，S-CQDs的荧光强度随着Fe3 +浓度从0到200μM的增加而逐渐降低。在0-200μM的范围内实现了良好的线性度。所开发方法对Fe3 +的检出限为0.050μM。实际样品中加标的Fe2 +和Fe3 +的回收率在98.2％至112.4％之间。最后，将拟议的与Fenton系统集成的S-CQDs用于口腔葡萄糖酸亚铁样品中Fe2 +和Fe3 +离子的检测，这在复杂样品中Fe2 +和Fe3 +离子的形态分析和测定中具有潜在的应用前景。
更新日期：2019-10-08
中文翻译：
开发了用于高选择性和灵敏荧光检测口腔葡萄糖酸亚铁样品中Fe2 +和Fe3 +离子的硫掺杂碳量子点。
以抗坏血酸和巯基乙酸为碳源和硫源，通过简便的一步水热法合成了具有稳定蓝色荧光的硫掺杂碳量子点（S-CQDs）。与Fe2 +和其他金属离子相比，制备的S-CQD对Fe3 +离子表现出敏感和选择性的反应。在存在足够的H2O2的情况下，Fe2 +完全转化为Fe3 +，这是铁离子的可确定形式，并且S-CQDs加入H2O2前后的荧光强度变化分别用于检测Fe2 +和Fe3 +离子。在最佳实验条件下，S-CQDs的荧光强度随着Fe3 +浓度从0到200μM的增加而逐渐降低。在0-200μM的范围内实现了良好的线性度。所开发方法对Fe3 +的检出限为0.050μM。实际样品中加标的Fe2 +和Fe3 +的回收率在98.2％至112.4％之间。最后，将拟议的与Fenton系统集成的S-CQDs用于口腔葡萄糖酸亚铁样品中Fe2 +和Fe3 +离子的检测，这在复杂样品中Fe2 +和Fe3 +离子的形态分析和测定中具有潜在的应用前景。
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