Implementation of an analytical method for the simultaneous determination of greenhouse gases in a reservoir using FID/µECD gas chromatography

ABSTRACT

The greenhouse gas emissions of CH₄, N₂O and CO₂ from a tropical reservoir and a tributary river that supplies it were measured from 2015 to 2019 using a GC-FID/µECD method. The chromatographic technique was used with a configuration of a methanizer and two specific columns, by direct injection of the gaseous samples using the floating static chamber as a field sampling method. The parameters analysed for the chromatographic methodology validation were selectivity, linearity, detection limit and quantification, bias (as a practical assessment of trueness), precision and uncertainty. These parameters were found to be satisfactory. The results showed a low deviation of the analysed data throughout the period evaluated.

KEYWORDS:

• Carbon dioxide
• chromatography
• diffusive fluxes
• hydropower
• methane
• nitrous oxide

Acknowledgments

The authors gratefully acknowledge the financial support provided by the Colombia Científica Program within the framework of the Ecosistema Cientifico call for proposals (Contract No. FP44842-218-2018). They also thanked the company ISAGEN and GDCON group at the University of Antioquia for financing through the agreement 47/26: “Quantifying GHG emissions for the Sogamoso Hydroelectric Project”.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Supplementary material

Supplemental data for this article can be accessed here.