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文献曾报导过芳香硝基衍生物的荧光测定方法,它是通过多步化学反应实现的,其灵敏度较低。本文是在荧光分析法测定苯胺的基础上进行的。在加热的酸性溶液中,铜催化剂存在下,硼氢化钾将硝基苯还原为苯胺,即可直接进行荧光测定。此拟定方法测定硝基苯的最低浓度为10PPb,平均回收率93％,平均相对标准偏差5％,它和还原——偶氮比色法测定结果基本符合。实验部分 1、仪器和试剂日立 850型荧光分光光度计激发光:波长235um 狭缝5um 荧光:波长340um
The literature has reported the fluorescence measurement of aromatic nitro derivatives, which is achieved by a multi-step chemical reaction with low sensitivity. This article is based on the fluorescence analysis of aniline on the basis of. In the heated acidic solution, the presence of a copper catalyst, potassium borohydride to nitrobenzene reduced to aniline, can be directly measured by fluorescence. The proposed method for the determination of nitrobenzene minimum concentration of 10PPb, the average recovery of 93%, the average relative standard deviation of 5%, which is basically consistent with the reduction - azo colorimetric assay results. Experimental part 1, instruments and reagents Hitachi 850 fluorescence spectrophotometer excitation light: wavelength 235um slit 5um fluorescence: wavelength 340um