Gas chromatography/combustion/isotope ratio mass spectrometric analysis of the stable carbon composition of tetrols |
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| Authors: | Wu Wang Li Li Huaijian Li Dongping Zhang Shen Wen Wanglu Jia Bangjin Wang Guo ying Sheng Jiamo Fu |
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| Institution: | 1. Institute of Environmental Pollution and Health, Shanghai University, 200444 Shanghai, P.R. China;2. Southern Medical University, 510515 Guangzhou, P.R. China;3. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640 Guangzhou, P.R. China |
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| Abstract: | The stable carbon isotope compositions of tetrols, erythritol and threitol were determined by gas chromatography/combustion/isotope ratio mass spectrometry (GC/C/IRMS). Using four tetrols with various δ13C values derivatized by methylboronic acid, the carbon isotope analysis method achieved excellent reproducibility and high accuracy. There was no carbon isotopic fractionation during the derivatization processes. The differences in the carbon isotopic compositions of methylboronates between the measured and calculated ranged from ?0.20 to 0.12‰, within the specification of the GC/C/IRMS system. It was demonstrated that δ13C values of tetrols could be calculated by a simple mass balance equation between tetrols, methylboronic acid, and methylboronates. The analogous 2‐methyltetrols, marker compounds of photooxidation products of atmospheric isoprene, should have similar behavior using the same derivatization reagent. This method may provide insight on sources and sinks of atmospheric isoprene. Copyright © 2009 John Wiley & Sons, Ltd. |
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