阻抑动力学光度法测定痕量硝基苯  

Determination of trce nitrobenzene by inhibition kinetic-spectrophotometry

作　　者：姚绍龙[1] 

机构地区：[1]成都师范高等专科学校化学系,四川彭州611930

出　　处：《化学研究与应用》2002年第3期322-324,共3页Chemical Research and Application

摘　　要：A new inhibition kinetic spectrophotometric medod for the determination of trace nitrobenzene was proposed,based on the inhibit effecy of initrobenzene on decoloration reaction of methyl orange (MO) for the oxidation of potassium iodate in the solution with pH=2.20 of hydrochloric acid and the activator stannous chloride.The kinetic condition of this reaction was investigated.Addition of the cetyl trimethyl aminonium bromide (CTMAB) can increase the sensitivity of the determination.The detection limit is 1.82×10 -7 g·L -1 ,ε 515 =1.2×10 5L·mol -1 ·cm -1 and the calibration graph is linear from 0.02～30.0μg·ml -1 nitrobenzene.The interference of aniline was eliminated by the addition of distillation in acidic solution.It was applied to the detemination of trace nitrobenzene in waste water with RSD=1.6%～2.3%.A new inhibition kinetic spectrophotometric medod for the determination of trace nitrobenzene was proposed,based on the inhibit effecy of initrobenzene on decoloration reaction of methyl orange (MO) for the oxidation of potassium iodate in the solution with pH=2.20 of hydrochloric acid and the activator stannous chloride.The kinetic condition of this reaction was investigated.Addition of the cetyl trimethyl aminonium bromide (CTMAB) can increase the sensitivity of the determination.The detection limit is 1.82×10 -7 g·L -1 ,ε 515 =1.2×10 5L·mol -1 ·cm -1 and the calibration graph is linear from 0.02～30.0μg·ml -1 nitrobenzene.The interference of aniline was eliminated by the addition of distillation in acidic solution.It was applied to the detemination of trace nitrobenzene in waste water with RSD=1.6%～2.3%.

关 键 词：阻抑动力学光度法 测定 硝基苯 二氯化锡 溴化十六烷基三甲铵 痕量分析 废水 

分 类 号：X132[环境科学与工程—环境科学] X832