摘要
目的:建立了空气中乙醇胺、三甲胺的离子色谱测定方法。方法:以20 mmol/L硫酸水溶液作为吸收液,以1.0 L/min流量采样20 min;采样后的溶液以甲基磺酸(MSA)和乙腈混合淋洗,Dionex IonPac SCS1柱分离,非抑制型电导检测。结果:乙醇胺和三甲胺在0μg/ml～200μg/ml范围相关系数均大于0.999,检出限分别为1.9μg/L和2.4μg/L,回收率分别为101.6%和99.0%,RSD均小于5.0%。结论:将该方法应用于实际空气样品的检测,结果满意。
Objective：To establish a sensitive method for the determination of ethanolamine and trimethylamine（TMA） in air by ion chromatography with non-suppressed conductivity detection.Methods： Ethanolamine and trimethylamine in air was sampled at a rate of 1.0 L/min and absorbed in 20 mmol/L H2SO4 solution.The separation was performed on an IonPac SCS 1 analytical column（250 mm × 4.0 mm i.d.） and an IonPac SCG 1 guard column（50 mm×4.0 mm i.d.） by using methanesulfonic acid（MSA） as eluent with acetonitrile as organic modifier.Results： The linear range of the method was 0 μg/ml^200 μg/ml for ethanolamine and trimethylamine both with correlation coefficients more than 0.999,the limits of detection were 1.9 μg/L for ethanolamine and 2.4 μg/L for trimethylamine,respectively.The recoveries were 101.6% for ethanolamine and 99.0% for trimethylamine,with RSDs less than 5.0%.Conclusion： The developed method was satisfied for the determination of ethanolamine and trimethylamine in air.
出处
《中国卫生检验杂志》
CAS
2011年第10期2397-2398,共2页
Chinese Journal of Health Laboratory Technology
关键词
乙醇胺
三甲胺
空气
非抑制型离子色谱法
Ethanolamine
Trimethylamine（TMA）
Air
Non-suppressed conductivity detection-Ion chromatography
