Journal
COMPUTERS & GEOSCIENCES
Volume 156, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cageo.2021.104896
Keywords
Densimeter; Barometer; Fluid inclusions; Raman spectroscopy; PVX properties; FRAnCIs
Funding
- CNRS-INSU CESSUR program
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Numerous calibration data linking Raman spectral parameters with PVX properties of different gases have been published, but discrepancies exist between them. This paper examines the inter-laboratory applicability of existing calibration data and provides universal calibration data and a user-friendly interface for measurements. The FRAnCIs Python interface facilitates the application of these calibrations and estimates measurement uncertainty.
Many experimental calibration data linking the variation of Raman spectral parameters (i.e., peak position, peak area/intensity ratio ... ) with the PVX properties of pure gases or mixtures of CO2-CH4-N-2 or CH4-H2O-NaCl systems have been published in literature by different laboratories. However, there is a significant discrepancy between these calibrations, leading possibly to inaccurate results when applied in another laboratory. In this paper, the inter-laboratory applicability of the existing calibration data is examined. Universal calibration data based on 78 regression equations and applicable for any Raman apparatus within any laboratory are provided in the form of a calculation program. The FRAnCIs (acronym for Fluids: Raman Analysis of the Composition of Inclusions) Python user-friendly interface facilitates the application of these calibrations as well as to estimate the uncertainty of the measurements.
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