Articles | Volume 18, issue 2
https://doi.org/10.5194/amt-18-421-2025
https://doi.org/10.5194/amt-18-421-2025
Research article
 | 
24 Jan 2025
Research article |  | 24 Jan 2025

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

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

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Short summary
Glaciers preserve organic compounds from atmospheric aerosols, which can serve as markers for emission sources. Most studies overlook the enantiomers of chiral compounds. We developed a two-dimensional liquid chromatography method to determine the chiral ratios of the monoterpene oxidation products cis-pinic acid and cis-pinonic acid in ice-core samples. Applied to samples from the Belukha Glacier (1870–1970 CE), the method revealed fluctuating chiral ratios for the analytes.