红外光谱法测定汽油中的N-甲基苯胺  

Determination of N-Methylaniline in Gasoline by Infrared Spectroscopy

作　　者：华正江[1] 方敏[1] 任飞[1] 袁丽凤[1] 

机构地区：[1]宁波出入境检验检疫局技术中心,浙江省宁波市马园路9号315012

出　　处：《光谱实验室》2014年第4期447-451,共5页Chinese Journal of Spectroscopy Laboratory

基　　金：宁波出入境检验检疫局科技计划项目（甬K13-2013）

摘　　要：通过对异辛烷、汽油和N-甲基苯胺的红外谱图进行分析，确定了3440cm^-1处吸收峰作为N-甲基苯胺的红外定量谱带．基于朗伯-比耳定律，采用0．5mm光程池，对系列浓度标准溶液进行3440cm^-1处吸光度的测定，并建立校准曲线．该曲线合适的溶液定量浓度范围在0．5-14g／L之间，并可定量测定含量不低于2．0g／L的汽油中N-甲基苯胺．方法准确性相对偏差小于5％．重复性（n=6）相对标准偏差小于2.0％．The infrared spectrum of isooctane, gasoline and N-methylani!ine was analyzed with the result that the absorption peak of 3440 cm^-1 was appropriate for quantitative analysis of N-methylaniline in gasoline. The calibration curve was established on Lamber-Beer equation law by 3440 cm^-1 peak absorbency of standard N-methylaniline solution with 0.5mm pathlength cell. This curve was available to quantitatively analyze N-methylaniline solution with concentration between 0.5g/L to 14g/L. The method was appropriate for quantitative analysing the content of N-methylaniline in gasoline not less than 2.0g/L. The relative deviation of method accuracy was found less than 5%, and the relative standard deviation （n=6） of repeatability was less than 2.0%.

关 键 词：红外光谱 汽油 N-甲基苯胺 

分 类 号：O657.33[理学—分析化学]