微分脉冲极谱法测定废水中微量硝基苯化合物

微分脉冲极谱法测定废水中微量硝基苯化合物 DIFFERENTIAL PULSE POLAROGRAPHY DETERMINATION OF TRACE COMPOUNDS OF NITROBENZENE IN THE WASTEWATER 韦进宝 Wei Jinpao first-author 李培标 Li peibiao 王小玉 Wang xiaoyu 本文研究了用微分脉冲极谱法测定污水中微量硝基苯化合物的方法。在0.05MNH 4 Cl-0.029N NaOH-0.001M EDTA的底液中,硝基苯产生一灵敏的峰电流。峰电位约为-0.58伏（相对于银-氯化银电极）。硝基苯浓度在1.0×10 -8 -1.0×10 -4 M范围内,浓度与峰电流具有线性关系。检测限可达10 -9 M。常见的阳离子和阴离子一般不干扰测定。曾用本方法直接测定不同类型污水中的硝基苯,结果是满意的。此外,对硝基苯胺,对硝基甲苯,2,6-二硝基苯胺、2,4,6一三硝基甲苯,它们在本底液中也产生灵敏的峰电流。在一定的浓度范围内,峰电流与浓度有线性关系,也可用于分析测定。 This paper studied differential pulse polarography determination of trace compounds of nitrobenzene in wastewater. A sensitive peak current of nitrobenzene can be obtained in the solution of 0.05M NH 4 Cl-0.029N NaOH -0.001M EDTA.The peak potential is about-0.58K（Vs.Ag-AgCl electrode）. The concentration of nitrobenzene is linear with peak current in the range 10 -8 M to 10 -4 M. The limit of detection for the determination of nitrobenzene is 1×10 -9 M. The method has been employed in the determination of nitrobenzene in differential kinds of wastewater and can are obtained succeseful results. In addition, p-nitroaniline, p-nitrotoluene, 2, 6-dinitroaniline and 2, 4, 6 -trinitrotoluene also produced sensitive peak Current as in the same base solution. It can be used to determine the above compounds. 硝基苯 微量分析 极谱法 trace analysis nitrobenzene polarography 1987-04-01 2021-04-01 4