冰核中手性有机标记物分析方法的开发与应用

IF 3.2 3区地球科学 Q2 METEOROLOGY & ATMOSPHERIC SCIENCES

Atmospheric Measurement Techniques Pub Date : 2024-09-03 DOI:10.5194/egusphere-2024-2243

Johanna Schäfer, Anja Beschnitt, François Burgay, Thomas Singer, Margit Schwikowski, Thorsten Hoffmann

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引用次数: 0

摘要

摘要。冰川是宝贵的环境档案，它保存了大气气溶胶中的有机化合物，可作为各自排放源的标记物种。大多数环境研究并不区分手性化合物的对映体，尽管这些化合物（主要来自生物源）在大气中非常常见。我们开发了一种二维液相色谱（mLC-LC）方法，可同时测定冰芯样本中单萜烯氧化产物顺式蒎烯酸和顺式蒎烯酸的手性比。该方法将第一维的反相色谱柱和第二维的手性色谱柱结合在一起，仪器设置简单，只需一个额外的六端口阀门。这种新方法被成功应用于西伯利亚阿尔泰地区贝卢哈冰川公元 1870-1970 年期间的部分冰芯样本。顺式蒎烯酸的手性比值出现波动，而顺式蒎烯酸的手性比值则在(-)-对映体过量的情况下保持稳定。

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Method development and application for the analysis of chiral organic marker species in ice-cores

Abstract. Glaciers are valuable environmental archives that preserve organic compounds from atmospheric aerosols that can be used as marker species for their respective emission sources. Most environmental studies do not distinguish between the enantiomers of chiral compounds, although these compounds, mostly from biogenic sources, are very common in the atmosphere. We have developed a two-dimensional liquid chromatography (mLC-LC) method that allows the simultaneous determination of the chiral ratios of the monoterpene oxidation products cis-pinic acid and cis-pinonic acid in ice-core samples. The method combines a reversed-phase column in the first dimension and a chiral column in the second dimension in a simple instrumental setup with only one additional six-port valve. This novel method was successfully applied to selected ice-core samples from the Belukha glacier in the Siberian Altai spread over the period 1870–1970 CE. The chiral ratio of cis-pinic acid showed fluctuating values, while the chiral ratio of cis-pinonic acid remained more constant with an excess of the (–)-enantiomer.

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来源期刊

Atmospheric Measurement Techniques METEOROLOGY & ATMOSPHERIC SCIENCES-

CiteScore

7.10

自引率

18.40%

发文量

331

审稿时长

3 months

期刊介绍： Atmospheric Measurement Techniques (AMT) is an international scientific journal dedicated to the publication and discussion of advances in remote sensing, in-situ and laboratory measurement techniques for the constituents and properties of the Earth’s atmosphere. The main subject areas comprise the development, intercomparison and validation of measurement instruments and techniques of data processing and information retrieval for gases, aerosols, and clouds. The manuscript types considered for peer-reviewed publication are research articles, review articles, and commentaries.