Integrating the controlled evaporation mixer with cavity ring-down spectroscopy for enhanced water vapor isotope calibration

Autor: Jangil Moon, Yeongcheol Han, Songyi Kim, Jeonghoon Lee, Soon Do Hur
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Journal of Analytical Science and Technology, Vol 15, Iss 1, Pp 1-10 (2024)
Druh dokumentu: article
ISSN: 2093-3371
DOI: 10.1186/s40543-024-00455-z
Popis: Abstract Accurate measurement of water vapor isotopes (δ18O and δ2H) is fundamental for advancing our understanding of the hydrological cycle and improving hydrological model accuracy. This study introduces an innovative calibration methodology using a controlled evaporation mixer (CEM) for determining stable isotopic ratios in atmospheric water vapor via cavity ring-down spectroscopy. The CEM technique reliably produces a stable water vapor stream, crucial for enhancing the precision and accuracy of isotopic measurements. Its rapid adaptation to changes in water vapor concentration and compatibility with different water standards enhance calibration reliability. Demonstrated reproducibility in generating water vapor across a broad concentration range from 900 to over 25,000 ppmv, coupled with a substantial reduction in memory effects, makes this approach highly effective in both laboratory and field settings. This calibration advancement greatly enhances research capabilities for continuous atmospheric water vapor analysis, providing deeper insights into hydrological processes and atmospheric dynamics.
Databáze: Directory of Open Access Journals
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