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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Particle-into-liquid sampler on-line coupled with solid-phase extraction-liquid chromatography-mass spectrometry for the determination of organic acids in atmospheric aerosols
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Particle-into-liquid sampler on-line coupled with solid-phase extraction-liquid chromatography-mass spectrometry for the determination of organic acids in atmospheric aerosols

机译：固液萃取-液相色谱-质谱联用在线颗粒进液采样器测定大气气溶胶中的有机酸

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摘要

In the present study, sample collection and preparation were directly integrated with a chromatographic system by coupling a particle-into-liquid sampler for the first time on-line with solid-phase extraction-liquid chromatography-tandem mass spectrometry. Several organic acids, such as adipic, hydroxyglutaric, mandelic, vanillic, cis-pinonic, pinic, azelaic and sebacic, were used in the research. For sample pretreatment and concentration, strong anion exchange material was used in the extraction. Sampling, extraction and analysis conditions were optimized to obtain reliable information about aerosol chemical composition. To evaluate the performance of the on-line coupled system, half of each sample was analysed on-line and the other half was derivatized and analysed off-line by gas chromatography-mass spectrometry. Comparison of the two techniques with use of t-test showed the results to be in an excellent agreement. Limits of detection of studied acids in on-line system were between 0.1 and 0.9. ng. The on-line coupled system is fast and reliable and a promising tool for the real time analysis of organic acids in atmospheric aerosols.
机译：在本研究中，通过首次将颗粒入液体采样器与固相萃取-液相色谱-串联质谱联用，首次将样品的收集和制备与色谱系统直接集成。该研究中使用了几种有机酸，例如己二酸，羟基戊二酸，扁桃酸，香草酸，顺-羽酸，松酸，壬二酸和癸二酸。为了进行样品的预处理和浓缩，在萃取中使用了强阴离子交换材料。优化了采样，提取和分析条件，以获得有关气溶胶化学成分的可靠信息。为了评估在线耦合系统的性能，对每个样品的一半进行在线分析，另一半通过气相色谱-质谱法衍生化并离线分析。两种技术与t检验的比较表明结果非常吻合。在线系统中研究的酸的检出限在0.1至0.9之间。 ng。在线耦合系统快速，可靠，是实时分析大气气溶胶中有机酸的有前途的工具。

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