1.四川文理学院 化学化工学院,四川 达州 635000
2.乡村低成本环境治理技术四川省高校重点实验室, 四川 达州 635000
3.石河子大学 化学化工学院,新疆 石河子 832000
黄小梅,教授,研究方向:纳米材料及光电传感器,E-mail:dxw8066031@163.com
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邓祥,黄小梅,邓子禾等.碳量子点荧光探针的制备及其在苦味酸检测中的应用[J].分析测试学报,2023,42(06):736-742.
DENG Xiang,HUANG Xiao-mei,DENG Zi-he,et al.Preparation of a Carbon Quantum Dots Fluorescent Probe and Its Application in Detection of Picric Acid[J].Journal of Instrumental Analysis,2023,42(06):736-742.
邓祥,黄小梅,邓子禾等.碳量子点荧光探针的制备及其在苦味酸检测中的应用[J].分析测试学报,2023,42(06):736-742. DOI: 10.19969/j.fxcsxb.23022802.
DENG Xiang,HUANG Xiao-mei,DENG Zi-he,et al.Preparation of a Carbon Quantum Dots Fluorescent Probe and Its Application in Detection of Picric Acid[J].Journal of Instrumental Analysis,2023,42(06):736-742. DOI: 10.19969/j.fxcsxb.23022802.
以银杏叶为原料,采用水热法制备得到新型荧光碳量子点(CQDs)。该碳量子点的平均粒径为5.5 nm,最大激发波长为335 nm,最大发射波长为418 nm。基于碳量子点荧光光谱与苦味酸(PA)吸收光谱存在部分重叠而发生荧光共振能量转移(FRET),建立了以碳量子点作为荧光探针用于苦味酸检测的新方法。在最佳实验条件下,加入苦味酸前、后的荧光强度比值(,I,0,/,I,)与苦味酸浓度(,c,)在0.2 ~ 800 μmol/L范围内呈良好的线性关系,相关系数(,r,)为0.999 5,检出限(LOD)为32 nmol/L。在5、40、80 μmol/L加标水平下,实际水样中苦味酸的回收率为98.0% ~ 104%,相对标准偏差(RSD)为1.0% ~ 3.2%。该方法可用于实际样品中苦味酸的灵敏、快速和高效检测。
Fluorescence carbon quantum dots(CQDs) were fabricated by hydrothermal method with ginkgo leaf as the raw material,which have an average diameter of 5.5 nm,a maximum excitation wavelength of 335 nm and a maximum emission wavelength of 418 nm.A novel method of CQDs for picric acid(PA) detection was established,based on fluorescence resonance energy transfer(FRET) due to the partial overlap between CQDs fluorescence spectrum and PA absorption spectrum.Under the optimal experimental conditions,there existed a good linear relationship between fluorescence intensity ratio before and after adding PA(,I,0,/,I,) and PA concentration(,c,) in the range of 0.2-800 μmol/L,with a correlation coefficient(,r,) of 0.999 5 and a limit of detection(LOD) of 32 nmol/L.The spiked recoveries for PA in real water samples at 5,40 and 80 μmol/L levels ranged from 98.0% to 104%,with relative standard deviations(RSDs) of 1.0%-3.2%.This method could be used for the sensitive,rapid and efficient detection of PA in real samples.
银杏叶碳量子点荧光探针苦味酸
ginkgo leafcarbon quantum dotsfluorescent probepicric acid
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