Journal
ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES
Volume 46, Issue 3, Pages 392-399Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/10256016.2010.505686
Keywords
air; acetaldehyde; carbon-13; ethanol; gas chromatography-isotope ratio mass spectrometry (GC-IRMS); headspace solid-phase microextraction (HS-SPME); isotope measurements; leaves; methanol; natural isotope variations
Funding
- Ministry of the Environment, Japan [19510005, 22510006, A-0904]
- Grants-in-Aid for Scientific Research [22510006] Funding Source: KAKEN
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Isotopic signatures of atmospheric methanol and acetaldehyde have the potential to improve our ability to quantitatively assess their importance in atmospheric chemistry. However, isotopic measurements of atmospheric methanol and acetaldehyde and their individual source and sink processes have been limited. In this study, we examined gas chromatography-isotope ratio mass spectrometry combined with headspace solid-phase microextraction to measure the carbon isotope ratios of methanol and acetaldehyde in air samples. The method enabled us to determine carbon isotope ratios with a precision (1 standard deviation) of +/- 0.6 parts per thousand for 20ml of air sample containing more than 3ppm of methanol and +/- 0.7 parts per thousand for 20ml of air sample containing more than 2ppm of acetaldehyde. Moreover, the applicability of this method to determine isotope ratios of methanol and acetaldehyde emitted from detached plant leaves was demonstrated.
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