Determination of methylamines and trimethylamine-N-oxide in particulate matter by non-suppressed ion chromatography
Determination of methylamines and trimethylamine-N-oxide in particulate matter by non-suppressed ion chromatography
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DOI：
10.1016/j.chroma.2010.01.066
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发表时间：
2010-03-26
影响因子：
4.1
通讯作者：
Purvis-Roberts, Kathleen L.
中科院分区：
文献类型：
--
作者：
Erupe, Mark E.;Liberman-Martin, Allegra;Purvis-Roberts, Kathleen L.
建立了离子色谱-非抑制电导检测器同时测定大气颗粒物中甲胺（甲胺、二甲胺、三甲胺）和氧化三甲胺的方法。通过阳离子交换色谱法，使用3 mM硝酸/3.5%乙腈（v/v）洗脱液和Metrosep C 2 250（250 mm x 4 mm i.d.）分离柱考察了不同色谱参数对分离效果的影响。甲胺、二甲胺、三甲胺和N-氧化三甲胺的检出限分别为43、46、76和72 μ g/L。保留时间的相对标准偏差在0.42%~ 1.14%之间，回收率在78.8%~ 88.3%之间。该方法适用于确定是否甲胺和三甲胺-N-氧化物是一个重要组成部分的有机氮气溶胶在这些物种的浓度高的地区。(C)2010 Elsevier B. V.保留所有权利。
An ion chromatography method with non-suppressed conductivity detection was developed for the simultaneous determination of methylamines (methylamine, dimethylamine, trimethylamine) and trimethylamine-N-oxide in particulate matter air samples. The analytes were well separated by means of cation-exchange chromatography using a 3 mM nitric acid/3.5% acetonitrile (v/v) eluent solution and a Metrosep C 2 250 (250 mm x 4 mm i.d.) separation column. The effects of the different chromatographic parameters on the separation were also investigated. Detection limits of methylamine, dimethylamine, trimethylamine,and trimethylamine-N-oxide were 43, 46, 76 and 72 mu g/L, respectively. The relative standard deviations of the retention times were between 0.42% and 1.14% while the recoveries were between 78.8% and 88.3%. The method is suitable for determining if methylamines and trimethylamine-N-oxide are a significant component of organic nitrogen aerosol in areas with high concentration of these species. (C) 2010 Elsevier B.V. All rights reserved.