气相色谱-质谱法测定大气颗粒物中的有机胺类物质

发布时间：2018-04-09 03:36

本文选题：大气颗粒物　切入点：有机胺　出处：《分析化学》2017年04期

【摘要】：建立了大气颗粒物中有机胺类物质的气相色谱-质谱(GC-MS)分析方法。样品用超纯水超声萃取,然后在碱性条件下,用苯磺酰氯(Benzenesulfonyl chloride,BSC)衍生化,衍生物用二氯甲烷萃取,最后用DB-5MS色谱柱分离测定,实现了13种有机胺(包括7种脂肪胺、2种杂环胺和4种芳香胺)的同时测定。本方法的仪器检出限(S/N=3)和定量限(S/N=10)分别为0.00008~0.017μg/m L和0.00026~0.0565μg/m L;标准曲线线性相关系数为0.9903~0.9996,相关性良好;相对标准偏差(RSD)均小于30%,除低浓度加标水平的甲胺和苯甲胺,其余样品基质加标平均回收率为54.4%~159.7%,大部分胺具有较高的精密度与准确度。将本方法应用于广州城区PM~(2.5)样品的检测,共检出有机胺9种,其中甲胺、二甲胺和二丁胺约占9种有机胺总和的90%,是PM2.5中主要胺类物质,而丙胺浓度最低,浓度小于1.0 ng/m~3。
[Abstract]:A gas chromatography-mass spectrometry (GC-MS) method for the determination of organic amines in atmospheric particulates was established.The samples were extracted by ultrapure water and then derivatized by benzenesulfonyl chloridehl chloride under alkaline conditions. The derivatives were extracted by dichloromethane, and determined by DB-5MS column.Simultaneous determination of 13 organic amines (including 7 aliphatic amines, 2 heterocyclic amines and 4 aromatic amines) was carried out.The average recoveries of the other samples were 54.4%, 159.7%, and most of the amines had higher precision and accuracy.The method was applied to the detection of PMN 2.5) samples in Guangzhou City. Nine kinds of organic amines were detected, of which methylamine, dimethylamine and dibutylamine accounted for 90% of the total of 9 organic amines, which were the main amines in PM2.5, while the concentration of propylamine was the lowest (less than 1.0 ng 路m ~ (-1) 路m ~ (-1)).
【作者单位】：中国科学院广州地球化学研究所有机地球化学国家重点实验室;中国科学院大学;
【基金】：国家自然科学基金重大研究计划培育项目(No.91544101)资助~~
【分类号】：X831;O657.63

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