基于碳点增强过氧亚硝酸与碳酸盐化学发光的亚硝酸盐传感
Nitrite sensing based on the carbon dots-enhanced chemiluminescence from peroxynitrous acid and carbonate.
作者信息
Lin Zhen, Dou Xiangnan, Li Haifang, Ma Yuan, Lin Jin-Ming
机构信息
Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou 350004, China; Beijing Key Laboratory of Microanalytical Methods and Instrumentation, Department of Chemistry, Tsinghua University, Beijing 100084, China.
Beijing Key Laboratory of Microanalytical Methods and Instrumentation, Department of Chemistry, Tsinghua University, Beijing 100084, China.
出版信息
Talanta. 2015 Jan;132:457-62. doi: 10.1016/j.talanta.2014.09.046. Epub 2014 Oct 7.
In this work, chemiluminescence (CL) from peroxynitrous acid (ONOOH)-carbonate system greatly amplified by carbon dots was observed. The CL mechanism of the ONOOH-carbonate-carbon dots system has been investigated and the results reveal that the carbon dots could serve as the energy acceptor, which gives us new insight into the optical properties of the new emerging carbon nanomaterial. There is a good linear relationship between the CL signal and the concentration of the nitrite using for ONOOH formation, which provides us a nitrite sensing method with sensitivity as high as 5.0×10(-9) M (S/N=3). The method has been successfully applied to the determination of nitrite in tap water with the recovery of 98%. The standard deviations are within 2.5%.
在这项工作中，观察到过氧亚硝酸（ONOOH）-碳酸盐体系的化学发光（CL）被碳点极大地放大。对ONOOH-碳酸盐-碳点体系的CL机理进行了研究，结果表明碳点可作为能量受体，这为我们对新兴碳纳米材料的光学性质提供了新的见解。CL信号与用于形成ONOOH的亚硝酸盐浓度之间存在良好的线性关系，这为我们提供了一种灵敏度高达5.0×10⁻⁹ M（S/N = 3）的亚硝酸盐传感方法。该方法已成功应用于自来水中亚硝酸盐的测定，回收率为98%。标准偏差在2.5%以内。
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