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Carbon dots as rapid assays for detection of mercury(II) ions based on turn-off mode and breast milk.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy ( IF 4.3 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.saa.2020.118320 Martyna Pajewska-Szmyt 1 , Bogusław Buszewski 1 , Renata Gadzała-Kopciuch 1
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy ( IF 4.3 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.saa.2020.118320 Martyna Pajewska-Szmyt 1 , Bogusław Buszewski 1 , Renata Gadzała-Kopciuch 1
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In this research, nitrogen co-doped carbon dots were synthesized by solid thermal method with citric acid used as the precursor of carbon, and melamine as nitrogen source. Such carbon dots show high quantum yield of 44%. Furthermore, the native fluorescence of CDs can be reduced by mercury(II), while other metals had no significant influence on fluorescence intensity. During the study, the optimal parameters were selected, such as pH or time for incubation with analyte. Under the optimal conditions, quenching effect caused by mercury ions was evaluated. It was observed that with increasing mercury concentration, the fluorescence of the carbon dots decreased proportionally. The response was characterized by linearity within the range from 2 to 14 μM. Moreover, the limit of detection was 0.44 μM. It was the first time that human milk was used as a real sample to test the applicability of carbon dots. The study results demonstrated good recovery in the 74-111% range (RSD < 6%) As a novel carbon material, CDs show promise for broader applications in analyzing complicated biological samples.
中文翻译：
碳点作为基于关闭模式和母乳检测汞（II）离子的快速测定法。
本研究以固热法以柠檬酸为碳前驱体，以三聚氰胺为氮源，通过固热法合成了氮共掺杂碳点。此类碳点显示出44％的高量子产率。而且，汞（II）可以减少CD的天然荧光，而其他金属对荧光强度没有明显影响。在研究过程中，选择了最佳参数，例如pH或与分析物一起孵育的时间。在最佳条件下，评估了由汞离子引起的猝灭效果。观察到随着汞浓度的增加，碳点的荧光成比例地降低。响应的特征是线性范围为2至14μM。此外，检测下限为0.44μM。这是第一次将人乳用作真实样品来测试碳点的适用性。研究结果表明，在74-111％的范围内具有良好的回收率（RSD <6％）作为一种新型的碳材料，CD有望在分析复杂的生物样品中得到更广泛的应用。
更新日期：2020-04-01
中文翻译：
碳点作为基于关闭模式和母乳检测汞（II）离子的快速测定法。
本研究以固热法以柠檬酸为碳前驱体，以三聚氰胺为氮源，通过固热法合成了氮共掺杂碳点。此类碳点显示出44％的高量子产率。而且，汞（II）可以减少CD的天然荧光，而其他金属对荧光强度没有明显影响。在研究过程中，选择了最佳参数，例如pH或与分析物一起孵育的时间。在最佳条件下，评估了由汞离子引起的猝灭效果。观察到随着汞浓度的增加，碳点的荧光成比例地降低。响应的特征是线性范围为2至14μM。此外，检测下限为0.44μM。这是第一次将人乳用作真实样品来测试碳点的适用性。研究结果表明，在74-111％的范围内具有良好的回收率（RSD <6％）作为一种新型的碳材料，CD有望在分析复杂的生物样品中得到更广泛的应用。
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