Determination of highly polar compounds in atmospheric aerosol particles at ultra-trace levels using ion chromatography Orbitrap MS.
Determination of highly polar compounds in atmospheric aerosol particles at ultra-trace levels using ion chromatography Orbitrap MS.
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离子色谱-轨道阱质谱法测定大气气溶胶颗粒中高极性化合物的超痕量水平。
DOI：
10.1002/jssc.202001048
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发表时间：
2021-04
影响因子：
3.1
通讯作者：
Carlo Kwiezinski;C. Weller;D. van Pinxteren;M. Brüggemann;S. Mertes;F. Stratmann;H. Herrmann
中科院分区：
文献类型：
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作者：
Carlo Kwiezinski;C. Weller;D. van Pinxteren;M. Brüggemann;S. Mertes;F. Stratmann;H. Herrmann
开发了一种使用离子色谱法与高分辨率 Orbitrap 质谱联用的方法来定量大气颗粒的水过滤提取物中的高极性有机化合物。通过 KOH 梯度，总共 43 种化合物在 33 分钟内分离，包括短链羧酸、萜烯衍生酸、有机硫酸盐和无机阴离子。通过添加 100 μL min-1 异丙醇作为柱后溶剂并优化离子源设置，可以最大限度地提高电喷雾电离作用。检测限 (S/N ≥ 3) 在 0.075-25 μg L-1 范围内，优于之前报道的 22 种化合物。萃取回收率通常为 85-117%。所开发的方法应用于三个环境样本，包括两个北极飞行样本和一个来自大陆背景研究站点梅尔皮茨的样本。所有样品总共鉴定出 32 种不同的化合物。从北极飞行样本中，有机示踪剂首次被定量，浓度范围为 0.1-17.8 ng m-3 。由于样品制备最少、有益的品质因数以及可获取的化合物范围广泛（包括极性很强的化合物），新方法比现有方法具有优势，并且能够对大气气溶胶颗粒中的有机标记化合物进行详细分析。本文受版权保护。版权所有。
A method using ion chromatography coupled to high-resolution Orbitrap mass spectrometry was developed to quantify highly-polar organic compounds in aqueous filter extracts of atmospheric particles. In total, 43 compounds, including short-chain carboxylic acids, terpene-derived acids, organosulfates, and inorganic anions were separated within 33 min by a KOH gradient. Ionization by electrospray was maximized by adding 100 μL min-1 isopropanol as post-column solvent and optimizing the ion source settings. Detection limits (S/N ≥ 3) were in the range of 0.075-25 μg L-1 and better than previously reported for 22 compounds. Recoveries of extraction typically range from 85-117 %. The developed method was applied to three ambient samples, including two arctic flight samples, and one sample from Melpitz, a continental backround research site. A total of 32 different compounds were identified for all samples. From the arctic flight samples, organic tracers could be quantified for the first time with concentrations ranging from 0.1-17.8 ng m-3 . Due to the minimal sample preparation, the beneficial figures of merit, and the broad range of accessible compounds, including very polar ones, the new method offers advantages over existing ones and enables a detailed analysis of organic marker compounds in atmospheric aerosol particles. This article is protected by copyright. All rights reserved.