饮用水中硝基苯的电化学检测

Electrochemical detection of nitrobenzene in drinking water

中文关键词:  硝基苯  碳球复合纳米金  传感器  电化学

英文关键词:nitrobenzene  carbon sphere composite gold nanoparticles  sensor  electrochemistry

中文摘要:

      目的 采用碳球复合纳米金金刚石电极(carbon sphere composite gold nanoparticles/ diamond electrode, Cs-Au/NBDD)传感器定量分析水中硝基苯。方法 以碳球复合纳米金为基质, 金刚石电极为工作电极, 制备Cs-Au/NBDD传感器。结果 Cs-Au具有良好的导电性和电催化作用, 能有效促进电化学反应的进行, 使氧化峰电流提高了30.78%, 提高了Cs-Au/NBDD灵敏度。利用Cs-Au/NBDD对水中的硝基苯进行定量分析, 硝基苯浓度与其氧化峰电流在0.002~0.065 g/L呈良好的线性关系, 线性方程为Y=58.1894X?0.034, r2=0.9982, 检出限(S/N=3)为0.00124 g/L, 且该传感器重复性较好, 加标回收率在98%~100.5%之间, 精密度较高。结论 该方法准确、可靠, 可用于硝基苯的快速定量分析。

英文摘要:

      Objective To quantitatively analyze nitrobenzene in water using carbon sphere composite gold nanoparticles/diamond electrode (Cs-Au/NBDD) sensor. Methods Cs-Au/NBDD sensor was prepared by using carbon spheres composite gold nanoparticles as the matrix and diamond electrode as the working electrode. Results CS-Au had good electrical conductivity and electrocatalysis, which could effectively promote the electrochemical reaction, increase the oxidation peak current by 30.78%, and improve the CS-Au /NBDD sensitivity. Nitrobenzene in water was quantitatively analyzed by CS-Au/NBDD. The concentration of nitrobenzene and its oxidation peak current showed a good linear relationship between 0.002?0.065 g/L. The linear equation was Y=58.1894X?0.034, r2=0.9982, the limit of detection (S/N=3) was 0.00124 g/L, and the repeatability of the sensor was good, the recoveries were 98%?100.5%, and the precision was high. Conclusion This method is accurate and reliable, and can be used for rapid quantitative analysis of nitrobenzene .