| 基于头孢克肟的荧光熄灭效应用于微量铬(VI)的灵敏检测 |
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| 引用本文： | 伍娉,何婧琳,曹小妹,朱爽丽,潘畅,曹忠.基于头孢克肟的荧光熄灭效应用于微量铬(VI)的灵敏检测[J].化学传感器,2014(2):52-57. |
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| 作者姓名： | 伍娉 何婧琳 曹小妹 朱爽丽 潘畅 曹忠 |
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| 作者单位： | [1]长沙理工大学化学与生物工程学院,电力与交通材料保护湖南省重点实验室,湖南长沙410004 [2]湖南师范大学化学化工学院,湖南长沙410081 |
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| 基金项目： | 国家自然科学基金（21275022,21105005）; 湖南省科技计划项目（2013FJ3075）; 湖南省教育厅科研基金（12B002）资助 |
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| 摘 要： | 利用Cr(VI)对头孢克肟的荧光淬灭效应,建立了一种微量金属铬的荧光探针分析方法。以甲醇-盐酸(1.0×10-3mol/L)溶液(1∶1,V/V)为介质,最大激发与发射波长分别为397 nm和438 nm,头孢克肟荧光强度与Cr(VI)浓度对数呈良好的线性关系,其线性范围为1.0×10-6~2.0×10-3mol/L,线性方程可拟合为F=-25.09 lgc-36.61(r=0.995 6),检测限为5.8×10-7 mol/L。常见的共存离子不干扰测定,此方法可用于环境水样中Cr(VI)含量的测定。
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| 关 键 词： | 荧光光谱分析法 淬灭效应 头孢克肟 Cr(VI) |
Sensitive determination of trace Cr（VI） based on cefixime fluorescence quenching effect |
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| Wu Ping,He Jing-lin,Cao Xiao-mei,Zhu Shuang-li,Pan Chang,Cao Zhong.Sensitive determination of trace Cr（VI） based on cefixime fluorescence quenching effect[J].Chemical Sensors,2014(2):52-57. |
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| Authors: | Wu Ping He Jing-lin Cao Xiao-mei Zhu Shuang-li Pan Chang Cao Zhong |
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| Affiliation: | 1. Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410004, China;2. College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China) |
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| Abstract: | This paper discussed a fluorescence spectrometry for detection of trace chromium（VI） based on quenching effect of a new carrier cefixime. In methanol-hydrochloric acid（1.0×10^-3mol/L） media solution（1∶ 1,V/V）, the maximum excitation and emission wavelengths of cefixime were selected as 397 nm and 438 nm,respectively. Under the optimized experimental condition, it showed a good linear response relation of the cefixime fluorescence intensity and the logarithm of the Cr（VI） concentration in the range of 1.0×10^-6～2.0×10^-3mol/L, that the linear equation was fitted as F=- 25.09 lgc-36.61 with a correlation coefficient of 0.995 6, and the detection limit is experimentally determined to be 5.8×10^-7mol/L. No interferences from some common metal ions were observed. It has been applied to the direct determination of Cr（VI） in environmental water samples with a satisfactory result. |
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| Keywords: | spectrofluorimetry quench effect cefixime Cr（VI） |
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