Campus Units
Agronomy
Document Type
Article
Publication Version
Published Version
Publication Date
3-27-2014
Journal or Book Title
Global Change Biology
Volume
20
Issue
5
First Page
1363
Last Page
1365
DOI
10.1111/gcb.12446
Abstract
Photoacoustic infrared spectroscopy (PAS) is increasingly used for measurement of N2O and CO2 fluxes at the soil surface. However, PAS calibration is complex. Water vapor, CO2, and temperature interfere with accurate N2O measurement. To accurately measure N2O, PAS calibrations must compensate for these interferences. Our article, ‘Evaluation of photoacoustic infrared spectroscopy for the simultaneous measurement of N2O and CO2 gas concentrations and fluxes at the soil surface’ (Iqbal et al., 2013), compared PAS and gas chromatography (GC) analytical procedures. Results demonstrated that PAS can measure N2O concentrations (ca. 0.5–3.0 ppm) and fluxes (ca. 0.5–5.0 ppm min−1) with accuracy and precision similar to GC without interferences from H2O vapor or CO2 concentrations typically encountered in static flux chambers at the soil surface.
Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Recommended Citation
Iqbal, Javed`; Castellano, Michael J.; and Parkin, Timothy B., "Accuracy and precision of no instrument is guaranteed" (2014). Agronomy Publications. 197.
https://lib.dr.iastate.edu/agron_pubs/197
Comments
This article is published as Iqbal J, Castellano MJ, Parkin TB. 2014. Accuracy and precision of no instrument is guaranteed. Global Change Biology doi: 10.1111/gcb.12446. Posted with permission.