动力学光度法测定纺织品中的2,4-二硝基甲苯  

Kinetic spectrophotometry for the determination of 2,4-dinitrotoluene in textiles

作　　者：徐有宝 程玉龙[2] 洪锦清[2] 杨占军[1] 李敬[2] 蔡建和 

机构地区：[1]扬州大学化学化工学院,江苏扬州225002 [2]江苏省出入境检验检疫局轻工产品与儿童用品检测中心,江苏扬州225009 [3]江苏省检验检疫科学技术研究院,南京210001

出　　处：《扬州大学学报（自然科学版）》2015年第1期16-19,共4页Journal of Yangzhou University：Natural Science Edition

基　　金：江苏省高校自然科学基金资助项目(13KJB150039);质检公益性行业科研专项基金(201310059)

摘　　要：在酸性介质中微量的2,4-二硝基甲苯能够灵敏地阻抑高碘酸钾对甲基红的氧化褪色反应,基于此原理建立了一种动力学光度法测定纺织品中2,4-二硝基甲苯的新方法,并对测定过程中试剂的用量、反应温度、反应时间等进行了优化选择.在最优条件下,该方法对2,4-二硝基甲苯检测的线性范围为0.001 5-0.019g·L^-1,检测限为0.12mg·L^-1.在实际纺织物样品的分析中,2,4-二硝基甲苯的加标回收率达97.5%-99.6%,相对标准偏差为1.8%-5.3%.结果表明,该方法操作简便快捷,抗干扰能力强,重现性好且对环境友好.It is found that trace of 2,4-dinitrotoluene can sensitively inhibit the discoloring oxidation reaction of methyl red by KIO4 in HClmedium, and thus a novel kinetic spectrophotometry method is developed for the determination of 2,4-dinitrotoluene in textiles. The influence of the amount of reagents, reaction temperature, reaction time are examined in detail. Under the optimal conditions, the linear range of this method for 2,4-dinitrotoluene is 0. 001 5-0. 019 g · L^-1 with a detection limit of 0.12 mg· L^-1. The recovery values for the 2,4-dinitrotoluene in textiles are 97.5%- 99.6% with RSD of 1.8-5.3%. The developed method is easy to operate, sensitive, rapid, reliable and environment-friendly.

关 键 词：2 4-二硝基甲苯 动力学光度法 甲基红 阻抑作用 

分 类 号：O625.61[理学—有机化学] O657.3[理学—化学]